Which are the most popular command line interpreters?

[Jonathan]

The lists of stable interpreters on IFWiki are set out with the most-recently updated at the top, which you could use as a proxy for popularity, as a starting point anyway.

For TADS: TADS interpreters - IFWiki.

For Inform: Z-code interpreters - IFWiki and Glulx interpreters - IFWiki.

There was a recent poll about Z-code interpreters (at Which z-machine 'terp? - #8 by SomeOne2) though it was criticised for being badly structured:

@dfabulich

What does make sense is a platform-specific format-specific poll. What’s the best Z-code interpreter for Windows? What’s the best TADS interpreter for macOS? What’s the best ADRIFT interpreter for iOS? etc.