As lime mentions, look at swap. The Mint installer should have suggested it, but if not it’s pretty easy to setup after the fact (just use a swap file instead of a partition). Windows does this as well and it should pretty clearly deal with OOM.
Coral Island has a platinum rating on ProtonDB so it should be absolutely no sweat to run if you have the resources.










For ancient stuff, maybe, but AMD is also active in enabling new stuff in the kernel and userspace. AMD basically invented Vulkan, and have had the best open source driver stack for years at this point.
I love what Valve has done for Linux, but it’s the last mile of track at the end of huge amounts of outside work enabling the hardware to work in the first place.