In Graphene Os site, it says it has 3 years of support left. Normally my phones don’t last that long. So it’s fine for me, but obviouly I would recommend going for a newer Pixel version if you find a good deal. Edit: typo.

If you buy them second hand they are not expensive, I bought recently a Pixel 6 in backmarket for 200€ and it works perfectly.

Does this EU’s Digital Markets Act also applies for Android and all the preinstalled apps by Google and the phone manufacturer?

I really hope so, it should be taught, because for me it was a slow learning process. First I started using Obsidian, and moving all my notes from Evernote, Notion, and others manually. After that I moved to Logseq, which is like Obsidian but open-source. And the last step was using an open-source syncing tool (Syncthing) to have my notes synced locally in all devices. And now I have been 2 years self-hosting my notes in a really easy way.