AdaShovelace

I have never used Tumblr, and I have no idea whether it's chronological or whether it has an algorithm, but if it does use an algorithm, I can't imagine that changing when they join the fediverse. But even if most of them get an algorithmic feed combining tumblr and greater fediverse content, as long as I can access their content on my own terms, it's all good to me. Even if tumblr pulls lots of users away from smaller instances, it still works out ok because I can still control how I consume their content.

It only becomes a problem if tumblr pulls people away from the greater fediverse, and then disconnects from it, but that's a different issue altogether, and one that worries me more than algorithms

I mean honestly, it doesn't seem like it matters to me. An instance gets a feed from instances it has federated with. What difference does it make if one instance orders that content differently to another? It becomes another point of differentiation between instances, and non algorithmic options will always remain available at the instance level, and presumably even the user level

I don't know how I feel about it. I like that it will encourage people to join. I don't like that it isn't a generic mastodon interface. However, if flickr and tumblr are coming, this Vivaldi's way of doing is going to end up seeming pretty innocuous

Once I tried it, I couldn't go back. It's main issue is that it has very little 3rd party app support. MilkTea (designed for Misskey) is it really, and it's imperfect.

CalcKey (a misskey fork) has local only posting, channels, groups, chat (and group chat) and a "Drive" feature that lets you store and share files

I haven't used Diaspora or Friendica though, so I have no point of comparison

Mastodon's own app, which has been seeing its own improvements.

It is? I must have missed those

Sure, but it seems like a very specific niche to try and develop and fill, only to end up losing a chunk of your userbase when Tumblr goes live...

Tumblr itself is coming to the fediverse though, so I don't imagine anyone is keen to try and fill that niche in the interim