Build metadata in Semantic Versioning is a quite commonly misunderstood concept, which often sparks passionate online discussions on whether build metadata should be allowed in package repositories or not, and some of the confusion around this topic even seeps through into prominent online services and applications.

Ever since I started using a 4K monitor, I noticed that I have to adjust browser zoom almost for every site where I wanted to read content and not just glance at some excerpt. Looking closer at CSS styles on some of those sites I found that most of them used pixel unit sizes for pretty much everything, including fonts. I was puzzled at first by the widespread use of a technique that cannot compute sizes in a predictable way across various displays and devices, but further investigation confirmed that it was done on the advice of the CSS specification.