On thing is for sure... The Elthos Development Crew is not lazy. There have been ongoing updates all along, and continue to this very day. You can take a look here to find the Mythos Machine Update Log, which started when the Project went live in December of 2018.

Mythos Machine Update Log

However, that's not all. Elthos is a large project with a lot going on under its umbrella. When work is not being done directly on Mythos Machine, it is being done on the Rules Books, Story Writing and Content Creation, Artwork, and the myriad of other aspects. A lot of work goes into Elthos!