A few of us still idle in the IRC channel, #l1j on Libera. Every month or so, someone shows up to ask some questions, but they usually get tired of waiting and leave before anyone notices. IRC is still very popular in the FOSS world BTW, especially with those who dislike proprietary chat platforms.
It is true that the project isn't being worked on currently. Most are a bit too busy with work and other stuff right now to work on any side projects, or just moved on from gaming altogether. Another big factor is that the "classic" version (the one that matches the final US release) is pretty good and really there's only very minor stuff that could use fixing. There's a 3.63 branch that needs a lot of work though, if anyone's feeling froggy.