[arnvald]

A lot of bootcamps taught Ruby and Rails in the mid-2010s, so it hasn’t been stagnant for 15 years, maybe since 2017-2018. Then Python (with DS and ML domains exploding) and JS/TS (with Node and React) left Ruby far behind.

[kamaal]

That's not the definition of stagnant I would use. Its mostly on the lines of people learning the language, starting new projects, discussions etc.

There are more discussions on Perl being dead, than Ruby being alive.