Android, Google's phone software, used to make huge jumps from update to update. New features, major code changes, big ui updates. After a while, the changes weren't as radical. Nips and tucks rather than overhauls.
I can see a 6e that looks closer to what the early playtest UAs did; redone mechanics and new options, but built on the bones of 5e and more compatible than not. (Akin to how 1e and 2e are mostly compatible). I hope we don't ever see a 3 to 4 to 5 level of change again. Systemic slow change would be far better.