As much as I dislike it sometimes, language absolutely does evolve. Proper capitalization does not fit into this, though. It can completely change the meaning of something if it is not capitalized. It's not just at the beginning of sentences, it's proper nouns within a sentence. Unfortunately I don't have an example of this handy but it's happened to me several times in my life where I've been completely confused by this (mostly on Slack).

This is a merely showing off your personal style which, when writing a technical article, I don't care about.