

I get why Federation can cause issues (most of the time it’s moderation related), but why would an extra option be a deal-breaker? Federation can always be disabled on a per-domain basis if you prefer. In fact, I’d argue it’s best practice to only allow domains on a case-by-case basis to prevent spam and abuse.
On the converse, you can’t enable Federation on a platform that doesn’t have it.
Just give the hooman a rootbeer.