Well, there are things you can expect from a code editor, like not crashing or getting sluggish because you opened your logs. At least this issue was present when I left Textmate.
Besides that kind of details, Textmate is indeed a very well made product, that go t a lot of things right from the beginning as you said. But it's just sad to see it just "froze" as it is.
Anyway it's not really about an update frenzy, it's basically as it's not an open product but one we paid for, I expect them to polish it over time.