One thing I learned is that there are always better/more private/more open alternatives, but just because one hasn't reached the perfect solution doesn't mean that getting closer to it isn't an improvement. LineageOS uses GA, but I am still glad for their amazing work. My phone requires binary blobs to work, but is still more "free" than most other alternatives.
And I think this is what @firstname.lastname@example.org is all about after all, finding alternatives that are better, not ones that are perfect. (And sometimes the ones that seem perfect aren't that useable for non-technical users and are therefore not as perfect as they seem for the general population)
Mastodon ist ein soziales Netzwerk. Es basiert auf offenen Web-Protokollen und freier, quelloffener Software. Es ist dezentral (so wie E-Mail!).