that’s pretty disingenuous though… individual lemmy instances go down or have issues regularly… they’re different, but not necessarily worse in the case of stability… robustness of the system as a whole there’s perhaps an argument in favour of distributed, but the system as a whole isn’t a particularly helpful argument when you’re trying to access your specific account

centralised services are just inherently more stable for the same type of workload because they tend to be less complex, less networking interconnectedness to cause issues, and you can focus a lot more energy building out automation and recovery than spending energy repeatedly building the same things… that energy is distributed, but again it’s still human effort: centralised systems are likely to be more stable because they’ve had significantly more work put into stability, detection, and recovery

Come on, mate... Lemmy as a whole didn't go down, but instances of Lemmy absolutely did go down. As they regularly do, because shit happens.

Monero isn't like the other three, it's P2P with no single points of failure.

I haven't looked too closely at Nostr, but I'm assuming it's typically federated with relays acting like Lemmy/Mastodon instances in terms of data storage (it's a protocol, so I suppose posts could be local and switching relays is easy). If your instance goes down, you're just as screwed as you would be with a centralized service, because Lemmy and Mastodon are centralized services that share data. If your instance doesn't go down but a major one does, your experience will be significantly degraded.

The only way to really solve this problem is with P2P services, like Monero, or to have sufficient diversity in your infrastructure that a single major failure doesn't kill the service. P2P is easy for something like a currency, but much more difficult for social media where you expect some amount of moderation, and redundancy is expensive and also complex.