I'm not seeing the justification for this comment. If anything that license, like the BSL, is aimed at keeping the small guy who worked on X in business so they can profit from their work (always need to put food on the table) while also sharing its innards with the world.
If you’re able to self host and run the tool for any use, it’s effectively a free, extensible, modifiable software solution.
Copyleft licenses are as restrictive as the license DHH put out with Fizzy. I’m an Apache 2.0 or MIT licensing OSS advocate myself, but it’s difficult to argue that it’s worse or equal to a fully closed SaaS solution.
It’s not even remotely close to one of these bullshit “ee” OSS licenses