I think it's slowly being replaced there by Python, but it's very slow.
Personally, I know Lua and Python very well but I still used TCL a few years ago for something very specific: using ODBC on Windows. I gave more details on the Lua mailing list here: http://lua-users.org/lists/lua-l/2021-01/msg00067.html
Something like Python in good old days of 2.x before young internet javasceipt devs started pouring A LOT of new features to the language (feature creep).
Nowadays Python is so complex and flooded with ex C, C++, Java, JavaScript, Haskell programmers adding so many features, so fast that it's impossible to follow and understand them :(
Languages should not evolve on that rate. No time to master it :(
/rant
What? That's the worst thing about TCL.
anthk•1h ago
catwell•54m ago
anthk•33m ago
Altough the SDL2 bindings are very alpha.
iberator•6m ago