I feel the same way, couldn't have said it better.I've stopped modding too and have taken a step back from the community that I used to be very active in.
I've been driving in AC since it was in beta, back in 2013 (back then we had a dozen or so cars and just a few tracks). And unfortunately, eight years on, the game is starting to look a bit dated - even with CM, CSP and everything maxed out. It's the details that are lacking.
Like you, I have started to enjoy other games again. Not so much racing games, but I've drifted more towards the mainsteam AAA titles that I had lost interest in when AC first came onto the scene.
I'm keeping one eye on the sim racing scene though, and I hope that AC2 might reignite my waning interest.