Sysadm here as well, been using vi since the '80s. A year or so ago I threw away all my custom vimrc and went with (nearly) bone stock LunarVim, and have really enjoyed getting off the treadmill of maintaining a custom vim setup. Partly because of the 100s of machines issue, partly because of managing plugins and interactions between them. I program maybe 5% of the time, so the stuff I do to make it IDE-like often isn't worth maintaining for that 5% time, so I often end up with partially working plugins or whatnot.

LunarVIM has been a bit tricky, mostly related to upgrades around LunarVIM, usually neovim updates. But, the capabilities of having Language Server in vim have been so refreshing! Particularly when working with Python 2 code to bring it up to Python 3, pretty much just follow what Language Server says.

When it gets right down to it, there are only a couple little tweaks from my old setup I want to carry over, everything else I want to go back to using defaults (places where I've diverged my own functionality) and stop pushing around a poorly maintained manual config that gives me 10% of what Lunar or similar gives.