Baeically its a somewhat stripped down version of plasma ment to be used with a controller or remote, but it is only a DE, so applications that arent controller friendly are going to stay that way.

Setting steam to launch big picture by default tho would basically turn any powerful pc you have into a steam console (steam big picture) with an extra home screen (plasma bigscreen) that shows all your other applications

The “a” series is googles budget phones, they also use budget storage (ufs 3.1), its by no means super slow but definitely could be a contributing factor if your archive is very big with lots of random writes and reads

If your using a budget phone, storage tends to be slow

Even on some higher budget phones using slower storage is a regular cost cutting move

This should be a well know, but often misunderstood thing. Lots of reddit selfhosting threds urge people to buy a new mini-pc for its “low power draw” when usually its the same or 1-2watts less then a laptop from 2012. However performace to watt is much higher, so if you need massive preformance new is much better, if your system is idling most of the time anyway, basically no diffrence in buying old