Does the difficulty still reset to 1
Yes. It may be changed in testnet5:
https://bitcointalk.org/index.php?topic=5543921I'm not talking about the timewarp loophole that's been closed.
The timewarp was fixed during difficulty adjustment. But mining blocks on CPU is still possible in testnet4.
In fact I need to create an entirely new page for that.
Yes, different testnets have different rules. If there is enough content, then it can be splitted into several pages.