Welcome to Metroplexity! Glad you're enjoying things!
As I see it: it was a pretty niche game to begin with, and over time became more and more niche as web games went away, more mobile gaming, etc. I still enjoy finding new things to poke at and investigate, but I have 15 years of history with the game, I'm not sure how approachable it is to new people.
But for its current audience, the Patreon is still keeping it afloat, covering maintenance costs, some new updates. I think it's settled into a pretty slow but steady update plan. The last few halloweens have added new content to the main story line, and we anticipate access to the Executive floor of the Midgard Tower this year, which is close to the end of the main quest line.
Also, are there any plans for more interaction with the craters in the Slags?
The main crater in the slags is probably going to be the ultimate end to the main quest line - I think we'll jump down there eventually. Coming soon-ish??
Unasked-for advice: if you haven't already - I strongly recommend getting access to Downtown Midgard HQ for mid-October Halloween updates. Halloween has always been the gem of Mextroplexity events and will probably have long-lasting effects on the game.