I think it has. Fog Creek renamed itself to Glitch [1], sold off FogBugz (which then rebranded as Manuscript, then rebranded back to FogBugz). The last Fog Creek blog post was Feb 14 2018 (about becoming Glitch), and it looks like the blog was turned off in November 2018.
It's a bit of a miracle that the Joel On Software forums [2] are still accessible.
[1] https://glitch.com/about/fog-creek-is-now-glitch/
[2] https://discuss.fogcreek.com/