I got burned by the apps domain fiasco this year and it was the final nail in the coffin for me. I'm minimizing my reliance on Google now.
I did the same after having one of the free legacy accounts for about a decade. Migrated over to Fastmail and de-googled myself.
They basically removed a free tier that they explicitly guaranteed would be free "forever". Because of this people set up friends and family as users using the service. Google then told people no you have to pay ridiculous amounts per month for them to keep any apps they have already bought tied to your account and there's no way to seperate your account once it's tied in. They did this with a 2 month notice period.
They have since walked back some of that due to backlash. They're now saying that you have a 6 month notice period (July 1st) and that at some inderterminate time before july 1st they'll let you transfer your account to a normal free google account. You will however lose your email address as part of the process.
What happened?
A service that was supposedly free forever has been shut off with only a few months notice, an aggressive price structure, and no help to migrate data. Poorly communicated and badly executed - par for the course for Google these days.