I wouldn’t buy it to replace my phone. I want to keep that and my gaming devices separate.
I would buy it a dedicated handheld in a similar form factor to a phone + some controls. I’ve actually been looking at the AYN Thor for this exact use case. It would have to be the right price too.

I did the same thing with my RB button on my LCD model. I went the official repair route, which cost $130. If you can solder you can probably just replace it yourself, I just didn’t feel confident enough to do it.