If it opens up to the general public, I would anticipate 75% of relays will run in cloud providers because home hardware only goes so far.
That's a separate issue though, that is on alternative cloud providers to solve (for example by implementing more terraform apis).
People will only want to run their own hardware when stuff like startos, umbrella, etc give a more iPhone style UX. Idk if you tried them, but I am a devops engineer and startos is still pretty shitty from a UX perspective that I've been considering running umbrel side by side to compare.