Mastodon meta
My least favourite sharp edge of Mastodon is the fact that when you view someone else's post you only see replies to it that are known to your server - so there's actually a good chance there will be relies that are completely invivible to you, especially if you run your own instance
I'd love it if tapping a post kicked off a request back to the original server that fetched the current reply count, and provided a "view all replies" button if there were replies not yet visible to me
Mastodon meta
It's not a given that their server has all the replies, either. (ActivityPub doesn't really have the concept of a thread being "owned" by someinstance; it's much more similar to an e-mail thread that consists of messages that happen to reference older ones' IDs, but then can be sent wherever.)
