The campaign I'm DMing uses 2014 D&D. We advance at a very slow pace. Our current campaign started in early 2020 and the players have only made it to 9th level (we play at most a couple of hours every other week, and we had a ~1.5-2 years hiatus during covid).
Hopefully the campaign will draw to a close within a few months. After that, my plan is to have several one-shots/mini-campaigns using different systems, some very close to 5e (e.g. Exodus) other very different (Phoenix Dawn Command). We'll see if my players are onboard.
I'm also playing in a 2014 Rime of the Frostmaiden campaign. The DM is looking into 2024, but since we are still 4th level I think it will be a while before we move to that.