I have installed Netrunner 18.03 Idolon, wiping Kubuntu, and everything is fine. There weren’t many updates, around 10 or so. One thing I noticed in Discover is when you click on a program the preview pics don’t come up, probably a server thing? I installed a couple of programs. Now I can get onto the other PCs. Cheers.
PS I am running kernel 4.18 in Mint 19.1 no problems.