Glitch was acquired by Fastly, so it's not a fully independent mid-sized tech co, but it does seem to be doing well and seems reasonably independent still.
I don't know neither Fog Creek or Glitch, but what you're writing sounds like you're putting a negative spin on it. To me it sounds wonderful that it's not yet another startup/company that basically boils down to "take over the world with VC funding or die trying".
I mean Fog Creek used to be a strong proponent of developer facing decisions like private offices for developers, and (back when it was a novelty) spending time easy onboarding and builds.
People like to rag on MSFT, but when I was there (around mid 2000s), this was very much the norm. Meeting rooms and shared spaces, but generally every engineer had their own office (at least in my BU).