From what I understand, their guess is that Apple is now checking if the device also has support for other services, such as FaceTime. Beeper Mini and pypush don't pretend to support FaceTime, so it breaks.
Their hope was that they got close enough to an actual Apple device that breaking it would break Apple devices. It turns out they weren't close enough, but they could be with a few improvements.
Yes. They have a fork of Synapse that they can continue to use even if the license prevents them from using upstream (which doesn't seem true, but I could be wrong).
Kind of, but it's more complicated. I'm not sure if the app itself will be open source, but currently, the method they use is. Either way, the hardest part is already done, but you still need a client (maybe; they might open-source it) and a notification server. I'm planning to attempt to build a Matrix bridge if I have enough time and it's not beyond my skills, but if you don't want the messages to be decrypted by the server, making the notification server and maybe client would be really difficult.
That's to prevent multiple entries by one person. Their security is very good, with audits and their products being largely open source (for this, PyPush. For Beeper Cloud, their Synapse fork and their bridges.). Only the parts that don't matter to security (the clients, mostly) are closed source.
I like bottom right the most, but it does't really feel like a default wallpaper as much as top left. Middle right feels like part of a tiling WM with custom colors more than a default for a DE.
Why does him being rich mean that his opinion on LLMs is invalid? If anything, LLMs require such vast amounts of money that he has more experience in that area because of his riches, not less.
First, they do have senses. For example, many LLMs can "see" images. Second, they're actually pretty good at describing things. What they're really bad at is analysis and logic, which is not related to senses at all.
Think of it like email. You need a client (like Gmail or Outlook), which for Matrix is usually Element, Schildichat (a fork of Element), or Fluffychat. You also need a server (like gmail.com). The most popular one is matrix.org, though it doesn't have any bridges. To get bridges, you either need to run your own server (much easier than it sounds with this) or use a server with bridges built in. Bridges are tied to the server. You also get an address, of the form @name:example.com, where example.com is the homeserver.
If you want to do it the easy (but slightly proprietary) way, Beeper is basically commercialized Matrix with preinstalled bridges and a slightly better UI. Some of their stuff is proprietary, but they contribute a lot to FOSS (several bridges I use are by them), and most of the internals are FOSS.
Vivaldi does too. It's nice.