Replacement only takes about an hour. The hardest part was finding batteries with the tabs already on them because I didn’t want to have to get a tab welding tool as I already have way too much crap. I did the batteries in mine about 3 years ago and they still work great. Unfortunately the source i got them from doesn’t sell them anymore.
I run SELinux on tons of servers at work. We taught our Oracle consultants how to use it. Some software vendors get mad at us because we require it and we always figure out how to make it work and it isn’t all that bad to work with once you’re used to it