Greetings Windigo,
We have a very similar story of how we started using Barrier, after both us being Synergy users.
My main use of Barrier is in in my home network mostly between my desktop PC running PCLinuxOS as the host and a laptop running Solus as a client.
In a recent Solus update Barrier disappeared!
Discovered in the update blog that Barrier had been forked to new software named InputLeap.
Their site is: https://github.com/input-leap/input-leap
On that site they state: "Input Leap is a fork of barrier, by barrier's active maintainers. Currently, barrier is considered unmaintained."
PCLinuxOS have yet to make this change, but the great news is that InputLeap and Barrier work together seamlessly.

I do notice that you have also recorded this show:
hpr4191 :: rkvm software KVM
Sounds like a good solution to a specific keyboard issue.
I look forward to listening to that show.