Telegram never was private, group chats never were encrypted (and that’s not an opinion: the feature simply is missing). If anything, they are just removing their false and deceiving claims. That they remained there for so long is something I can’t wrap my head around.

I’d argue XMPP is less ideal than Matrix because groups are located on a single server, which makes them easier to take down than Matrix’ replicated state.

That is true, but it’s never been a problem in my relatively long experience with XMPP: some server software can be used as a cluster and distributed, making it highly available (basically, the whole of WhatsApp runs on a fork of ejabberd), and the comparatively tiny resource usage of XMPP contributes to its stability.

XMPP does have a spec for F-MUC (distributed rooms somewhat like Matrix, many years before Matrix) and my rationale as to why it never picked up despite a whole decade of “competition” from Matrix is that it’s a problem that just doesn’t need solving. The price to pay for it is hefty: Matrix resource usage (bandwidth, CPU, RAM) is insane, its protocol complexity makes it a single-vendor implementation (which is risky on very practical grounds), and it’s not even bulletproof for the niche use-case it set to tackle: in the end, your identity server on Matrix remains centralized.

You can tell that I’m partial to XMPP, but that’s only after having been a service operator for years, with my original expectations largely favouring Matrix.

You can host (tens? of) thousands of XMPP sessions on a RPi at the back of your router or in a field hooked to a PV panel and sim card, and none of “the wealthy” knowing or caring about it, though. The difference with signal is that everyone can do that, and everyone doing it expands the network and makes it more resilient for the benefits of all.

How it works (to simplify) is them giving up on matrix clients ever becoming performant and well behaving on handheld devices (because of the absurd complexity of the protocol), and, instead of doing something about that, just decided to shift the client logic onto the server and castrating the clients (esp. for offline features). It’s also good short-term business because it makes hosting Matrix even more cumbersome and expensive, giving a compelling reason for the type of midscale/corporate deployments previously on the fence about their self-hosting costs (due to poor design and scalability) to just pay Element for that (while probably contemplating an alternative future).

Matrix has the tendency to require all participants’s servers to replicate all of the room state (who joined when, who said what when, whose avatar changed to what when, …) practically forever, and is sucking a ton of bandwidth and CPU for the privilege. It’s pretty bad, unfixable, and, if you ask me, over hyped.

Speaking about XMPP, compared to centralized services, at least the “who talks to whom” and metadata concerns in general are partially mitigated by not having all the metadata converge towards a single host, being able to selfhost, and being able to host behind tor/i2p/…

Other options for what exactly? Telegram practically has the same privacy and encryption guarantees as late 90’s forums and bulletin boards. If you want to learn nothing from that, keep using a centralized nonstandard service deprived of end-to-end encryption!

With only one having your interests at heart. An easy choice.

Many communities went back to IRC, though, because Matrix still is a hot mess, and the most visible ones which didn’t (Mozilla, KDE, …) are not hosting their own Matrix instance but letting New Vector do that for them, which makes in practice a disproportionate amount of users and accounts be managed by a single organization. I do think it’s better than discord, but barely so.

Don’t ever bring this to the people in charge or you might be told “sorry for that” “but now it’s been fixed, deployed any week now” “you are a liar, this has never been true” and “it doesn’t really matter for the general case” either in the same post or few responses apart. Matrix has been in a permanent state of unstable mess, and the leadership disingenuous attitude made me lose hope that this will ever change. More people should start reading through the fanfare and superlative blog posts, which, admittedly is the thing they do the best and much better than the other projects out there.