It really depends on how modular their codebase is. The Doom 1/2 modern ports they did in 2019 use Unity. But it’s actually still the original Doom underneath and just using Unity for input and output to make porting easier

Bigger screen than a regular android phone. Especially because your 6" 21:9 phone means a 16:9 picture on it will only take up ~5".

Also better controller. Those mounts for a phone on a regular Xbox/Playstation controller always make it too top-heavy since your phone has to be on top of the controller. And I love the idea of a full-sized controller over a Switch or even Steam Deck’s tiny buttons that just aren’t comfortable.

I’d probably only be interested if it lets you run actual Android stuff though. Have you seen the Logitech G Cloud gaming handheld? That one’s even more expensive, but it does run local games too.

why anyone would prefer that over simply using a regular Android phone with a good controller

I always think this is funny because that sums up /r/sbcgaming

I think the issue is always going to be games. Who wants to make games targeting such a small userbase? Half of the Android games don’t even have good controller support (looking at you Genshin/Honkai)