Well done Bart and team. I do understand that for some, change may be a bit hard to adopt to, but I can only imagine the effort of data for almost 300k users and 18(?) years of history to migrate to this awesome, search and notification friendly platform. That’s truly commendable.
Thank you! 
One aspect I did notice that may be good to think about is that links are always opening in the existing window. Not sure if there may be a global switch to make all links open in a new tab?
PS: found my own answer. It can be enabled in settings / preferences / interface. There is an option to let all external links open in a new window.