alt Hacker News> Your software can be made by you, for you.
Yeah, but it's probably derived from OSS software anyway either via license or LLM. That said, you can customize your Linux/BSD/Haiku/TempleOS as much as you want.
But consider the following: even in the better case of an OS making 1% of OS userbase (vs. 0.0000001%) no one wants to support it.
Want to play Diablo? Better to sit down and waste your time.
That's the beauty of containers, virtual machines like QEMU or compatibility layers like Wine/Proton. As long as your super esoteric software implements the interfaces those rely on, you are able to run everything else.