If people would just stop playing matchmaking and be willing to play customs it would be fine. We have to tools available to play "classic" Halo and even have fan-made forge remakes of classic maps. But every time I try to get a customs party night going I get maybe one reply here or on Halo forums elsewhere.
Landed on exactly 500,000/500,000gs with exactly 18500 achievements and exactly 500 games. All 100% including DLC. Was going hard the first half of January to reach that goal! Finished it on 1-19-2016. Final achievement: Completion Serenity in Nero.