The real competitor for green aviation isn’t hydrogen, it’s bio-fuel. Bio-kerosene, bio-gas and bio-ethanol all have useful roles in aviation, and are essentially carbon neutral over their lifecycle. Zero carbon at the proverbial tailpipe is a lot less important when that tailpipe is at 30,000 feet.

ReactOS is a very fun project, but anyone expecting it to be a real useable OS is absolutely mad. It’s been going for almost 30 years, and they’re almost at the point of binary compatibility with Windows Server 2003…

You’ve pretty much just described ActivityPub and the Fediverse.

Anyone can spin up their own instance. You can self host on a machine in your house, or with any cloud provider. You can broadcast messages in Twitter-style or Reddit-style format. Anyone can navigate to your web address and see your messages. Anyone who federates with you can see it on their website. FOSS Android apps are available.

You can’t force anyone to actually read your messages of course, but that’s a different matter.