Are these genuinely useful apps or cynical efforts to clone popular games/apps and monetize via ads? If the latter, volume says more about the business model than demand for novel functionality.
I feel that it doesn't make sense to expect the exact same transition desktop went through to happen on mobile, mobile is just different and has a different set of constraints.
If my laptop is connected to the Internet, it's fast. That isn't as universally true on mobile. (Desktops are also more reliably connected to the internet when on.)
In general there’s plenty of performance to go around. For many things I don’t see a big difference between an M1 Pro MacBook and 6 yo machines.
Performance, measured in human units--e.g. time to load, refresh, et cetera--is fine. That's what ultimately matters. The customers are the humans. Not the machines.