Even if you allow 1.9+ like some servers do, you end up with a lot of glitches. 1.7 and 1.16, for example, don't mix well at all. It's really hard to keep everything compatible and there isn't really any benefit to doing so because 1.9+ is so unpopular elsewhere.

it's provocative it gets the people going

gotta be big mad to make a post like this lol