The quality of open source from startups vary significantly, but so does open source in general.

This is a very disrespectful comment.

Well, the parts I could integrate with upstream projects, such as Selenium, I already had. Much of the remaining stuff is useful in its domain and small enough in scope where on-going development really shouldn't be necessary. And the parts I thought would essentially be "dumped", I opted not to open source for precisely that reason.

While this comment is poorly expressed, I would guess that the majority of Open Source projects atrophy very quickly.

Would be interesting to see how many Github projects have regular monthly updates after 12 months, 24 months, etc.

wow, take a good hard look at what would be the software world without OSS

I don't want to go into a rant or anything but really your comment is wrong at so many level

dumpster ? as if open source could only result from some failed attempt