Or alternatively, all the comments across them should be visible in-line in all communities.
Either of these approaches gives the agency to users to only reply to one of the cross post and read all the opinions/thoughts on that post. At the same time, it maintains the federation philosophy by not taking a community about a topic down, if the instance fails.
Everyone says subscribe to hashtags to get content. I have no idea how to do that on the official Mastodon Android app. If it’s that obtuse, it’s not going to catch on easily.
Microblogging was never my preference and as it wasn’t easy enough to figure out in the app itself, being a casual user, I never looked it up in a guide/video.