Way to, once again, evangelize for battery equipment ("the future is here"), while ignoring almost everything TobyU said.
The OP provided a wishlist for his mower. A few of the key ones were:
- Powerful and strong torque engine that doesn’t stall in knee high grass on a damp Saturday morning
- Commonly found parts
- "Forever" mower
Each of these criteria, by themselves, are sufficient to rule out all battery mowers. Unfortunately, nothing made in the last 5 yrs, gas or battery powered, will meet all of these criteria. Planned obsolescence has been a problem for decades, but only in the last 5 yrs or so in the OPE industry. This means that there ARE gas powered mowers that meet this criteria, but nothing battery powered.
Battery mowers CAN be the right solution in some situations. If the OP wanted something quiet to mow 500 sq ft, I wouldn't recommend a 60" commercial ZTR. I would probably recommend a manual reel mower, with a battery mower as an alternative. Trying to force battery equipment as the right solution when it's not is just foolish, and looks a LOT like pushing an agenda.