I have 12GB of RAM in my phone (in comparison to 4GB in my mini PC (good enough for XFCE (although the browser will still eat a good chunk))), the only thing that runs realiably is Termux.

But the power management is just shit. My last 2 phones kill the fucking built-in alarm clock. I can set it to unrestricted in settings, I can enable exception in DuraSpeed, or do whatever many steps the current device needs, but at best it’s a coin flip whether alarm will work or not.