I’d rather that ATProto was just compatible with activitypub to begin with, or allowed for meaningful federation.

Bluesky structure is too different from Mastodon instance to have a direct link. Brid.gy is the link between the 2 networks. Isn’t is enough already for federation ? From the AP side, it’s just a mastodon instance. However by default it’s not open to everyone, Bluesky users and Mastodon user first need to opt-in to be able to interact.

Boobam, a japanese blogger did a report / comparison of Bluesky with Mastodon. One of his conclusion on Mastodon, is that it can’t grow too much, by design. The more Mastodon traffic grows, the slower is gets and smaller instances will be overwhelmed. Now, there is no defined limit from when Mastodon will slow down so much it will be unnusuable. You can use your favorite translator to read the page: https://whtwnd.com/boobam.bsky.social/3l5uqcwjawe2e