Sure its not already crap? I mean look who makes it. Would i have to jailbreak my headset to watch porn?

No way would i use an iphone. I outgrew its capabilities in 2010, spent 3 years not updating until i could get an untethered jailbreak and finally gave it up in 2013. I have helped people with iphones and ipads since then and nothing has convinced me to go back.

Well, if we wanted say 50 million users at 5000 users per instance we would have 10000 instances. If we wanted 1 billion users we would have 200 thousand instances

I dont think so. As an example, take the !technology@beehaw.org community for example. It can have say 1000 subscribers from lemmy.ml but only needs to send content to lemmy.ml once as it comes in. All 1000 subscribers see the cache copy from lemmy.ml and a message is only sent back to beehaw.org for comments, votes, etc. With everyone having their own instance beehaw.org would have to send updates to each one instead of sending an update to one instance and 100 users seeing it. A good level to strive for is many small communities of say a few thousand (1-5 thousand or so). That way one single server doesnt get to massive but federation requests arent overwhelming instances either

Prob server load. You are a lemmy.world user and i think that may be one of the better known instances

You seem like the right person to ask. If a user on instance b makes a comment on a post that is on an instance “a l” community my understanding is instance b sends that comment to instance a and then instance a sends messages to instances c, d, e, f, and so on telling them about the new comment?

I miss the information density of redreader. Everything just feels so spread out.

Yeah, they took the web version down because it was unreliable. It should be back later this year

I just deleted both my reddit accounts but overwrote years worth of comments and posts first

Pixel anything