It depends I guess.
I use website + email + ConverKit
But if your goal is mainly editorial, I think Substack saves a lot of time, helps with discoverability and you don't have costs
In my case, I prefer to "control de experience", automate some stuff and things like that
@lisadziuba As far as I know, you just need to export the emails, but I never used it. But in other cases, migrating for a platform is always a pain hehe