Which Cambridge colleges tend to keep PhD students in college housing the longest?

Hey all — I’m curious about how long people usually get to stay in college accommodation at Cambridge.

I’ve heard it really varies: some colleges move people out after the first year, while others let you stay in college housing for most (or even all) of your degree. For those who’ve been here a while, which colleges seemed best at keeping students on campus long-term?

Bonus points if you know which ones are near the Downing Site area and have a relaxed, outdoorsy sort of vibe.