>>107718724IDs would be per thread rather than boardwide.
The only "post history" would be within the thread you're currently posting in.
Again, I don't see why you're so defensive about the idea of IDs when
1. It's something that has already been done on multiple boards on this site
2. There's no downside unless you're actually just here to stir shit
/biz/ /qst/ /bant/ and fucking /pol/ all have IDs and I don't see anyone calling them reddit.