What is the most underrated positive change in software development in the last five years?

The sunsetting of Internet Explorer

I think localization (offering multiple languages on user interface) which is really easy to implement, not only for multi languages but even for a one language it helps adding large content with better accuracy (like singular/plural, masculine, feminine, ...)

So I think it is easy to implement yet most of sites seem not doing it to my opinion.

The introduction of no code tools.