I'll agree with you for sure no objective metric for quality (that is broad enough to capture a satisfying amount of what we mean by quality). I do think user

I'll agree with you for sure no objective metric for quality (that is broad enough to capture a satisfying amount of what we mean by quality). I do think user experience/expectation bugs are very language dependent though. First you have the quality of the String and Datetime libraries. Ruby has all kinds of high quality string functions that are a source of pain and bugs in C. Say your project wants to display the different between two datetimes as "5 minutes ago" or "last month" (in several languages). Saying "1.27 days ago" is correct to an extent but also not pretty. There exist high quality libraries for this, but not in every language, and a lot of devs would stumble on this feature. The other is UI creation, I would say it is easier and faster to create a really nice UI with HTML/CSS/JS than with native Android. Maybe I'm wrong on this example but I bet there is a pair of UI frameworks where this is true.