Indeed, I had a 1st to 20th level 3x5e game where we used a mix of Level Up Advanced 5e, D&D 2024, and D&D 2014. It went fine. We used just the core books so I didn't have a million subclasses come in.
I shared my experiences here:
If I were doing it again, I'd have one core set of rules at the table so we didn't have a mix of potion drinking rules and the like. I don't think its the ideal way to play but you sure can mix up a lot of subsystems from various 5es in one game – Luck and Doom from TOV, Safe Havens and Supply from A5e and so on.