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.

I’m told they’re similar, but I’ve never used Obsidian.

Logseq vs Obsidian - which PKM tool should you use?

Logseq is a block-based outliner, allowing you to organise information into a tree-like structure using bullet-points. You can think of it as a mind-map, but for text. This allows users to quickly structure and add hierarchy to their information by indenting information, and to also move quickly between different branches of information.

[…]

In contrast to the outliner approach, Obsidian is a page-based application that functions like a long-form text editor, similar to a Microsoft Word document. The key advantage over traditional word processors is the instant searchability of all files and folders, as well as seamless linking between different pieces of information.

How to use Obsidian and Logseq together and why Markdown matters

I use Obsidian alot, they are very different in how they work as far as I can tell. Obsidian is more like a pure notebook with a HUGE amount of useful plugins. I use the KanBan and OCR functions alot with their Google-esq search.