Comcast introduced the “Xfinity” branding in 2010. I still call refer to it as “Comcast”. Any conversation I have where an ISP comes up, the word “Comcast” is used. If someone says “Xfinity”, they often follow it up with “you know, Comcast”.

Now that’s a VERY clear brand change.

The name “X” is a VERY confusing brand change. It will likely be called Twitter forever. In fact at some point Musk will sell or give up on “X” and I guarantee within a year the new owner will change the name back to Twitter.