I'd assume Adam still lives in California.
I believe Adam is / was Chris's roommate at some point.
Imagine the timeline where Chris doesn’t move to California and stays in Pennsylvania.
Imagine the timeline that Bryan and Suzy didn't have access to social media, or Matt never showed DingDong Dream Daddy:
Bryan and Suzy don't stand on a soapbox calling out DingDong for his opinion on Dream Daddy.
No one except a couple of lovelies give a shit or talk about it.
Chris, DingDong, and Julian have continued access to the GameGrumps office, games, and equipment.
Matt and Ryan, who probably moved in part because of that situation: stick around a little longer for more crossovers.
Arin having a remaining tie doesn't burn all of his Newground bridges (probably wouldn't amount to a ton for his ventures).
Arin probably would've helped DingDong and Julian move, come the time.
DingDong doesn't get doxxed by the lovies and has less r/conspiracygrumps goblins stalking him.
DingDong doesn't try to kill himself and remains only 50% pessimistic instead of 99%.
We get maybe 1-2 more years of DingDong and Julian, a few more recordings with Matt, maybe another with (non-faggot) Arin and Dan.
DingDong and Juilian aren't stuck in their endless moving loops and are 3+ years further in their endeavors.
Once DD/J + Matt/Ryan moved, Chris who's (probably) still being friends with Arin has access to some GameGrumps staff.
DingDong and Julian more open to OneyStays sessions.
The YIIK finale is completed and we get to see Alex kiss Rory.
That game has wrought so much destruction.
Post 2020 in this timeline would be similar to now but with another Oneystays or two, and a couple other cast members probably. But we sure as hell would've had 12 or more great series out of it.