You can work around the need to go around updating all sites with your new email address… at least the next time you need to change your email address.
I use SimpleLogin to create a unique alias (on my own domain) for each website. When I finally migrated to Proton all I had to do was add the proton email address to SimpleLogin and delete my old GMail address to get it to point to Proton (I started migrating to aliases before moving away from GMail). Likewise if I ever move in the future I only need to update SimpleLogin. I was looking to move to Skiff when my Proton renewal was due!
To set this up I had to obviously update every single website which was very time consuming. However I have much better protection now as email addresses are disposable should a site start spamming me. The only site that actually knows my Proton email address is Bitwarden, Proton itself and SimpleLogin.
Looking in my account I have over 300 aliases. Crazy.
Regardless of who you choose. Use an aliasing service. It makes moving to a new provider/email address a breeze on the future. It took me days to go around updating all my 200 sites online. If I ever move from proton it will take me 5 minutes to ensure all my sites now go to my new provider.
My only tip would be to create a new domain rather than using a shared one. This will prevent some sites from blocking you from using an alias.
The biggest downside is there is a cost associated with doing all this. I’ve gone from free to paying for a domain (optional), SimpleLogin and protonmail.
If you’re going to use SimpleLogin and proton then look at their proton unlimited tier. I had SimpleLogin prior to proton so I only use the Mail Plus tier. SimpleLogin comes included in the unlimited tier.
This is what I’ve done. I’ve literally just moved to Proton from Gmail. I created aliases for all my sites. The only site that knows about my Proton email address is SimpleLogin.
The only emails in Gmail now are from Google services tied to that Gmail account.
I used Bitwarden to help generate the aliases.
I ran PiHole for years. It started as a way to block ads but then also a way to block games and YouTube for my kids so they get a break. I had to manually control this though. I switched to NextDNS last year because this can be done on a schedule and they can’t get around it such as swapping to mobile data on their phones.
In the house though I run AdGuard because there’s no way differentiate traffic for each of my kids NextDNS profiles. With AdGuard it can proxy DNS requests to take traffic from the TV in their bedroom and convert it to DNS over TLS so the traffic hits the correct profile. I don’t use AdGuard for anything else. It does not filter anything. It’s purely to make sure traffic hits the correct NextDNS profile.