It greatly annoys me that wayland still doesn't have any solutions for synergy/barrier type software. I depend on it daily for using my desktop and laptop and it's tedious to make the switch as it currently is.
I made a program called rkvm which works on a level below display servers (works with uinput directly) and thus doesn't suffer from these problems. Currently, it only supports Linux and Windows, where only client support is implemented on Windows, but it works well for my use case.
Need server on windows and client on linux so this won't work properly yet for me.
I've been meaning to try out barrier. How do you like it? Is it responsive/fast? I had synergy running across linux/mac machines a number of years ago and it wasn't super reliable back then..
I have been using synergy for 6 or 7 years. Barrier the past year. It works reliably, more so then synergy, and I'm typing this reply through barrier right now :) It also fixes a few quirks I had like xorg screen changes wasn't reflected in synergy and it would start having weird boundaries.