I think what happened is what was a 'Garden Tractor' in the past now is called a Sub compact, with the lowest in that category being the JD X500 which starts around $10k.
I was talking to a guy who has owned a Mahindra, which is smaller than the X500, for about 12 years, he loves it, it is 4x4, and its got a small diesel 2 cylinder motor. He wanted to upgrade to a new one because the old one has close to 4,500 hours on it, and what he bought then for $5,500, is gone now, and the smallest they make is the 1100, which starts at $15k. Kioti, MF and LS have all done the same thing.
For years we had Bolens Large frame tractors, starting with a 1250, then a 1455, then an H23, then a Bolens Iseki, which got sold when parts became a big issue in the early 90s. My uncle owned a Satoh Beaver, which was a great machine, made by Mitsubishi, about the same size as the Bolens Large frame and JD 300 series. But parts for that were a tough find back then. I suppose now the web may have made that easier but they are still rare models.
I started buying Simplicity and AC garden tractors by chance in the 90's, I happened on a 7119 with all the attachments in excellent shape but with a bad KT19, I swapped in a clean Magnum 20hp from a used Snapper mower and its still here today. I bought a 916 and a 7116 with no attachments, no deck but a brand new motor in a box, got both for $250 at a local auction. I put the new motor in the 916, and had a good running 16hp BS for the 7116. I've since added four 3400 models as well. I use the 3410 to run the tiller in the spring, it never comes off the back of that one, I use the 3410H to push snow, its got a plow attached at all times, plus a belly grader. The other 3410 with a three speed has a dirt plow, and my one shuttle, a 3410s has a brinly disk on it. My 7116 gets used with the snow blower, and the 916 also had a snow plow with power angle added.
They are simple to keep running, built like tanks, and cheap to own if they need work. They out work the old Bolens large frame mainly in that they both fit in smaller places, are easier to set up, and cheaper to fix. They also seem better at ground engagement vs the foot control hydro on the Bolens.
Foot control was the one thing I absolutely hated about the Bolens, It was nearly impossible to keep steady pedal pressure when mowing or plowing snow. The foot control meant it got used more as a point and shoot type of machine. You either pegged the pedal down or let up, anything in between meant your foot bouncing on the pedal.
I did try a few newer simplcity machines, but anything beyond the GTH series in the early 90's or the green Deutz Allis models isn't the same.
The best thing is that they made millions of these things. I'm in an area that never had a local dealer and they are still plentiful
I had one with a loader but found it sort of a nuisance most of the time. My Bolens 1250 and 1455 also had Johnson loaders. I have a larger tractor for that. If I need a loader, I use the Case 580E.
Over the years I've owned a Cub Cadet 1979-1200, a 1987 -2072, and a 2155. I had a JD 1982? 330, 1984 430, and a 1972 112, a 2001 MF 2718H and a 1998 Simplicity Landlord 20.
The 2072 was a good machine but the hydro needed repairs at 400 hrs, (leaks), the deck had to be replaced early on for rust, replaced with a welded aftermarket Haban deck, and the 1200 had overheating issues.
The JD diesels were more trouble than they were worth, the 430 had gone through several injection pumps and the machine in general seemed sluggish, the old Bolens ran circles around it in the dirt. I had a few Montgomery Wards Gilson S models, an S14, and S15, both were great machines, a bit smaller but more maneuverable than the larger models it competed with and the hydro was by far the toughest. I used both of mine for mowing in PA, and really wish I had kept them and sold the JD machines back then but I got talked into keeping green and selling the older S14 and S15. They were smaller, on par with a Sears Suburban but they were by far the best all around machines I ever had.
The 330 was short lived, I never much liked it and traded it for the 2072 when the 2072 was brand new. The MF 2718 was a mistake, an electrical mess, its twin Landlord 20 was just as bad. I don't think either ever started without tinkering, the deck was nice but the motor and newer configuration was a complete mess. If the motor doesn't power the machine via driveshaft, I don't want it for the most part, the only esception might be a larger Roper or Sears for mowing in the GT series, but nothing after the 90's.
Of all the 'garden tractors' I've owned the three that stand out to me are the Simplicity 7116H or 916H Allis Chalmers, the Gilson S15, and the Simplicity 3410 three speed.
I will likely own a Simplicity or AC machine forever, and would buy another Gilson in heartbeat if a deal popped up.
I won't touch anything newer, you can do a lot of rebuilding and repowering for what they want for this new stuff that won't last to see a second season.