Since when do we have 24 vs 24 servers and why?

I didn't play for a while so I wanted to ask.
Since when do we have 24 vs 24 servers and why?

I am not sure if I like it. Fighting makes a bit more sense but it feels a bit empty on some maps. And I guess it works better now.

We discaused that. Devs told us we gona get back the 64. But that was couple weeks ago. Hope we will get them back soon :D