Contrarian here. I wish all product managers were forced to work on a much slower machine, so that "make this shit fast" becomes the highest priority issue in the backlog.

Nobody is writing slow code specifically to screw over users with old devices. They're doing it because it's the easiest way to get through their backlog of Other Things. As an example, it is a priority for a lot of competitive games, and they perform really well on everything from the latest 5090 to a pretty-old laptop integrated graphics GPU. It's done not because they only hired rockstar performance experts, but because it was a product priority.