The classic Gmail is still available and you can still use it though...
I switched to fastmail, but I honestly miss Gmail's interface whenever I for some reason log in again.
Nor can I really confirm that slow loading speed. I keep hearing about it on hn, but it always finishes within 1 seconds on my end... And is even quicker on refreshes or navigating
/edit: chrome network monitor said 5.6s. it was useable after ~1s though. firefox takes ages, however