The reason why we have the 120 servers is so that they can be used by large Youtubers, streamers on Twitch and sometimes even by Chad himself when they want to record with their fans, or stream with as many players as possible. Or whenever there are enough people who are up for a really large SG game, they can go find some fun on those servers as well.
We are well aware that the 120 servers, and possibly some of the 48 ones as well aren't as popular as the regular 24 man servers, but I also don't see the need in removing them (talking about the 120 one here). We maybe have a maximum of 4 120 man servers in total on 1 big region (US, EU), while we have a lot more 24 servers, don't even ask me how many exactly... My point is, yes people don't play on it very often, besides on special occasions like whenever someone is streaming. However, since there are only a few of them, why would you remove those? They aren't exactly taking up that much space and whenever they would be needed, they are there to be used.
I have noticed that they can be buggy and that should be looked into, but just because not too many people want to play on it unless there is an event happening or something, and since there are only a few of them, I would keep them there for their availability whenever they are needed. Removing 4 120 servers and turning them into 4 24 servers wouldn't make that much of a difference and wouldn't be that difficult yes, but how would greanbeans be able to play during Chad's stream for example when all 48 servers are full with donors and staff?
I would say keep them. Besides the bugs that may occur, they're completely fine where they are at the moment.