For as long as I remember TEDx to exist, I hear people complain that ted talks suck now.
I always ask for example talks, and without fail it was a TEDx talk. And they never know that TEDx talks are very hit or miss in quality.
"proper" TED talks generally (but of course not always) have good quality (although, I haven't watched any lately. But a couple years ago I watched basically any tech or science related one)