It's not because they're "immature" or anything like that, and it's not a diss on anyone who still likes them, it's just that I tried to watch a new video of theirs and it just didn't hit me like it used to.
It's similar to what happened with me and the Nostalgia Critic (Tho admittedly with significant differences): I was a pretty big fan early on and for several years, but over time just fell off, started watching them more sporadically, before kinda just not keeping up with the new stuff anymore.
I have a pretty similar timeline, idk why but paper Mario was just super entertaining, also loved to watch their sonic playthroughs. I think after a while there’s only so much they can talk about and I got tired hearing the same two people with the same two perspectives on life. It’s good to find fresh content