>ruby, with its runtime, is complex and hard to build and deploy and host. Heroku et al take that away from you, but "getting it running on your laptop" alone is a sysyphian task. I've worked at and managed teams where this remained a timesink: where devs spend significant time "Debugging their environments".

I've solved that problem with docker compose. it took a while to get it right, but since then everybody can clone the repository, run one command and start developing.

but, yeah these are all valid points. As always, YMMV.