BDD was trying to recapture what TDD was originally, renamed from TDD in an effort to shed all the confusion that surrounded TDD. Of course, BDD picked up all of its own confusion (e.g. Gherkin/Cucumber and all that ridiculousness). So now it is rebranded as SDD to try and shed all of that confusion, with a sprinkle of "AI" because why not. Of course, SDD already is clouded in its own confusion.

Testing is the least understood aspect of computer science and it turns out that you cannot keep changing the name and expect everyone to suddenly get it. But that won't stop anyone. We patiently await the next rebrand.