GitHub language popularity, TIOBE ranking and Stack Overflow question frequency are amazingly uncorrelated. Do we have any reliable numbers?
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PYPL: PopularitY of Programming Language https://pypl.github.io/PYPL.html is a nice PL metrics tracker that's an alternative to TIOBE.
It has a clear methodology and it carefully chooses keywords to avoid e.g. Python metrics being affected by interest in snakes.
TIOBE considered misleading: https://blog.nindalf.com/posts/stop-citing-tiobe/
It claims that iOS + macOS is less than half the size of Visual Basic!
Where do you go for data on programming language popularity/usage?
In the past I've relied on TIOBE, but I've come to prefer Stack Overflow survey data. It seems to match my (N=small) observations.

