[shadowfox]

This seems like a bit of a strange take to me.

LTU was hardly about DSLs or even particular languages, though of course that came up on and off. It was fundamentally a place with discussions on PL theory and related stuff, with the front page being predominantly about current papers. So, the success of Javascript/drop in DSL popularity seem like a strange reason for LTU to stop being useful.

[recursivedoubts]

Perhaps it is a strange take, but LtU seemed a lot more relevant to programming in general earlier in the millenia when the programming language question was less settled. From what I remember the really hot discussions were around things like closures, generic programming, dynamic typing, etc. Lots of new and potentially relevant languages were emerging so there was just more tumult in general, and a lot more interest in language features amongst generalists.

Perhaps my biases though: maybe there was some other reason why LtU ended up getting a lot quieter.