@Bilouette91
There's this other thread that was started a cpl of days ago
where someone says
It used to be that if you started a new city on an old account it would still have the old tech tree. This sounds like they are changing it so ALL new cities get the new tech tree no matter what.
could this somehow be affecting ? the beginning of it about starting new city on an old account.
I'm curious because I've been thinking of testing this myself. Now I'm wondering whether I should use another email when starting/confirming the new city.
EDIT
Decided to have a quick look...
I started an account beginning of september international server and (new acc in Beta today) compared to that at least "Neighbourhood" (chapter I) and "Fellowships" (chapter II) researches have disappeared. So something has changed.
Couldn't spot anything related to Spire in either account, it has been in chapter IV for a while now hasn't it. I can't remember any research related to that but the international server account fell asleep out of boredom before that, so can't say for sure.