Used to play a lot, but like other older names in here, I got bored. Played it up until around 2 years ago, and occasionally I play for an hour with a friend or two. However I felt the game was best when heavies were the only tier 10s and since the others were introduced it has slowly gone downhill, although the interface (not the garage) has improved as they added mods into the standard client.
The graphics got a massive update a couple of years ago too, the game looks fantastic, unfortunately they did not really fix any of the gameplay underneath so a lot of people who returned for that patch soon left again.
I do wonder how much of my current dislike for the game overall is out of boredom or the current state of the game overall. Difficult to know and the fact I played it as my go-to game from October 2011 until around 2017/18 certainly shows it has it's merits (or had).