I'm keen to use it as soon as the dependency story is mature (eg. it is packaged in Debian). This doesn't seem likely to happen any time soon.
I'm sure many people won't care about this. But for me, it's a measure of quality. I expect to be able to deploy and not worry about it, except for security updates, for at least a couple of years, preferably more. Constantly moving dependencies spidering out to a multitude of other projects, and Docker Compose, provide no such confidence.
Edit:
Ironically, just after posting that I came across this, which I think proves why my concern is warranted: https://news.ycombinator.com/item?id=45169657
Debian isn't immune to this, but it's much harder for such an attack to be successful when dependencies aren't constantly changing.