Folks leave Nostr all the time. The reasons vary, I'm sure. For many, it could be the the UX. There are a lot of things Nostr clients generally expect of their users that are completely foreign to them, and there's not much for up-front explanation or guidance. For others it could be that they just couldn't find the their tribe here. There's a bunch of Bitcoiners, devs, and freedom-tech enthusiasts, but if you are burnt out on those topics, or just looking for something else in general, you have to do some digging to find it. For still others, it may be that Nostr is a very interesting experiment, but they could never convince enough of their established social circle to move here, so they went back to where their people are, even if it is objectively the worse option. A smaller number left because they think that Nostr has failed in its goal of being censorship resistant, because relay owners can limit who can post to their relay, clients can automatically hide content from spammers, and users can limit who has access to their attention using tools like Web-of-Trust. Some others have left because they think Nostr is too censorship resistant, since it can't completely prevent objectionable or illegal content from being posted. We had a CSAM spammer a while back who really made Nostr an unpleasant place for those who didn't have their relay configuration set up well, and I am sure that caused some folks to flee for "safety." And there are probably a whole lot of other reasons I didn't think of or didn't mention. That said, Nostr is still the only truly decentralized and censorship resistant social protocol out there. It is also incredibly flexible and easy to build on, as exemplified by the wide variety of apps using Nostr under the hood. We have your expected Twitter-clones, long-form clients, music apps, fitness trackers, divine, and even a VPN that uses Nostr on the back-end. And all of it using a digital identity that can log into every single new Nostr app, without any centralized account authority. Nothing else comes close to what Nostr has achieved.