They haven’t stopped using OxygenOS, the 13 ships with OxygenOS 15.0
Just displace whatever gas is left in there with water first.
Pretty much every major open source project at this point. I need to start looking into donating to the programs I use the most.
My GPU has a decorative cover that magnets into the backplate but honestly I prefer seeing the PCB
As for an alternative, set up stable diffusion with a web based frontend on a PC and access remotely. It’ll draw the same power as a videogame for 5-60 seconds per image. At least this way you’re not paying someone to use electricity on your behalf.