Elon Musk says the service formerly known as Twitter is getting rid of the option to block other users, except in DMs. There, you’ll still be able to block unsolicited messages from anyone sending malicious, offensive missives, which is for some, the majority of their DMs.
But Musk said it "makes no sense" to block other users instead of muting them. Outside DMs, the mute option will still be available. There is a wrinkle here, noted on Musk’s own tweets. If the company did nix the ability to block users, it would violate policies for both Apple’s App Store and Google Play Store. (A web app, however, would be unaffected.)
In the spring, X killed off the platform's free API, which broke many third-party apps. Just one year earlier, Twitter (as it was known at the time) started recommending third-party apps to help mitigate harassment on the platform. Many of these, like Block Party, stopped working after those API changes.
– Mat Smith