I haven't bothered degoogling, but I made a conscious decision probably 7 or 8 years ago to not depend on it for anything important. Heck, I even have my own third party based location tracking that dates back to when I was using that for billing clients - IIRC from one of those times when Google killed off a service I was using.

The disappearance of my Google account would be annoying (I'm using an android phone if nothing else), but that's about it. I'd probably lose a lot of contacts, but a lot of them would be people I haven't really interacted with since I migrated them off my Palm Tungsten T3 so not a huge loss. I'd lose my calendar entries that remind me it's Taco Tuesday 3-for-5 day at a local taqueria, but I'll probably remember that.

Financial accounts? No. Domain registrations or hosting? Nope. Business email? Nope. Social media? Not primary at least. Cloud hosting or services? Oh hell no.

Google is fine as long as you keep in mind that it's a giant behemoth to which you and any concerns you might have matter not one bit. It's also a capricious enough behemoth that relying on it for anything important seems foolish.