Why is TIOBE still talked about? Their data is complete nonsense. Don't believe me? Look at how it's made:
https://www.tiobe.com/tiobe-in...
It's basically searching for "$LANGUAGE programming" on various search engines, then taking the "5 million results found" counts. After that they use some fudge factor they seem to have come up by themselves. Why is google.com worth 7.69%? Why is Wikipedia the second in the list, do mentions on Wikipedia go up and down by language popularity? Why is google.co.uk in the list, when it also returns English results?
Does Google even promise that the result count they display is remotely accurate?
Let alone that this barely means anything if it worked because it's trivial for anyone to inflate counts by encouraging the use of the term, or it can also go down if some prominent site happens to go down.
It's an absolutely terrible metric and I don't understand why anyone cares about it. At least try to be remotely accurate. Look at Stack Overflow activity. Look at commits on Github. Look at subreddits. Something that indicates actual usage at a given point in time.