No, actually. Sorry I should've explained more in the post.
The plan is to always send 2 requests, one with user details (to get upvotes, read posts, bookmarks etc) and the other without any personal data.
The one with a JWT attached to the requests can't be server-side cached, since that would be a security risk.
The one without any personal data can however be cached.
So when I first do a server render of any page, almost all content will be cached and served instantly. Then I do a client side fetch of the same data, filling in user data such as bookmarked posts for example.
Effectively, this will make the time until you see posts and stuff much faster.