Yes it says Fediverse. They probably do mean microblogs, where at least it's a real phenomenon. It could also apply to stuff like Pixelfed.

In the threadiverse, you're posting in a community, not your profile. It's on the community to downvote unwanted comments and on mods to remove rulebreakers. In a rare post an OP doesn't want any advice, like sharing art or a personal story, unless it's a written rule of the community it's on the OP to explicitly say so.

A neighbour I didn't know started it. I just volunteered to help, she moved away, I have four more volunteers helping so it's nearly no work individually. It's a citizen initiative, but we did ask the city for free stuff, namely an Ecoo compost bin and permission to use that spot.

I help run a communal compost heap, it's easy work and saves a lot of trash from going to the trash furnaces.

It's kinda true, NSCA Mosaic was licensed to multiple companies that made their own modifications. By the time of the antitrust (around 2000?) they probably didn't have any code in common anymore.

Of course your job would be even easier if there was only one engine left. Comparing it to what we had in the IE era though is completely bonkers.

Yeah I've heard this too. Both iOS and Android hide their file structure. But besides that most things are done online without files.
So people who learn mobile or websites before computers use it less.

You can chat on different servers, so I'd say it's federated.