I have a Model M that's a few years older than I am. It's great, and it still works, but is not as good for long-term typing as the keyboards I've used as daily drivers.

Clicky switches are a big plus for me, since they provide the audio and tactile feedback, and are just plain fun to use. The best clicky switches (imo) are the Kailh Box types with a little spring dedicated to the sound + feel of the click, but you're never going to find those preinstalled in a keyboard because they're still considered niche.