Theyre two different softwares with two different apis, you can't
mac
https://boost.lemy.lol <- link to it, doesnt work for instances not connected to it like lemmy.world but theres still ~ 26 major ones
The modlogs public to see removed comments. Just a bit difficult to navigate through currently
Instances are the ones hosting the data on their servers + things not having mods can devolve very quickly with things like the nazi bar problem or the scam links that have been getting posted and removed in some communities. This is a different thing than whats in the post though, the post is talking about all communities needing to be fetched manually the first time theyre viewed
Code blocks got updated in 0.19, lemmy.world is still on a 0.18 version
Active is a combination of that and hot but is essentially hard capped at 2 days. Things past that wont show up
Theres the new comments sort which works like that though
Currently theres also mbin (fork of kbin) and lotide that have instances running them
Also some others in development but nobody running them yet
Didnt say to go anywhere, just said that people on .world cant see content from hexbear on lemmy.ml posts shown by those comment counts above even though lemmy.ml federates with hexbear. (hexbear used since its the best example of a large blocked instance that can showcase this well. Could have also used .world, .ml and beehaw and same point stands)
Same logic would apply to .world federating with threads. People on lemmy.dbzer0 for example wont see content from threads on .world posts or communities even if .world federates with threads
Just wanted to put a counterpoint to you saying people would need to deal with it indirectly which isnt true proven by the above. You dont need to strawman it by making it a different point
Instances that defederate with threads wont see content from threads even on other instances that may federate with them.
As an example here lemmy.ml federates with hexbear and world but hexbear and world dont federate with each other. On lemmy.ml posts world users cant see any comments made from people on hexbear and vice versa
- A post in the view of .world: https://lemmy.world/post/9466410 (282 comments)
- The same post in the view of hexbear: https://hexbear.net/post/1304992 (76 comments)
- The same post in the view of lemmy.ml: https://lemmy.ml/post/9207671 (306 comments)
So they wont have to deal with them indirectly
For old reddit style theres mlmym which fills that niche better (e.g. for you that would be at https://old.lemmy.world)
Default UI is currently getting overhauled in a bunch of different ways. Lemmy-Leptos for Lemmy itself, and new UIs for Sublinks and Piefed as they get constructed