My Minty Lenovo
I have Mint Mate 18.3 running on a venerable Lenovo T440s. Boot time is measured in seconds, not minutes, and it "just works". I have a VirtualBox installation of Windows 10 for compatibility with my co-workers, and even that boots up faster than some of my co-workers' laptops.
I did look at upgrading to Mint 19 a while back but it seemed pretty daunting at the time, kind-of "if it ain't broke, don't fix it", Maybe time to take another look?