Honestly my turn off was seeing Google Cloud and later DigitalOcean providing managed versions of it. If they see value in doing that I assume it's gonna be a pain in the arse to solo sysadmin it.

I later realised my blog and little side projects do not need a cluster but that's another story. I was mainly looking at it to learn than to properly utilize

Completely off topic, sorry. Whatever happened to Flynn.io? That was my favorite of the clustery things but it just sort of fell off the internet

e: oh. Answered by visiting the site just now. "Flynn is no longer being developed." that is a shame.