Garry's Mod is super nostalgic for me. When I got my first computer, Garry's Mod was the first game I downloaded and played. My favourite things to do were RP as a gun dealer in DarkRP or play JailBreak (RIP). Garry's Mod today still takes me back to those times. Something about it just feels right.
I do believe the reason it was disabled was because it was crashing players/the server. Seems like it was disabled back in August for it to be fixed, I'm not sure if it was ever looked into but obviously if it can't be fixed it shouldn't come back and should probably be replaced by something different.
+1 unless it causes further crashes.