It's on a date-based rather than feature-based cycle since 8. I think I recall there being talk of doing that back in the Sun era at one point, but then it ende

It's on a date-based rather than feature-based cycle since 8. I think I recall there being talk of doing that back in the Sun era at one point, but then it ended up being a multi-year wait regardless. Very much nicer this way, and although a few businesses are still stuck on 6 or 8 most places seem to be aiming to stay current with Long Term Support (LTS) releases (of which 17 is the current LTS and 21 will be the next one).