I'm old. I remember the days when VS released a major new version, with a major new version of libraries, every quarter. Yes, major releases every 3 months. The current release schedule is SLOW in comparison.
You've never been able to "know it all" in this field, and it's only going to continue to become more difficult. That's actually true in most fields. However, if you learn the basics, any of the rest can be learned easily when you have a need. So I've never understood the anxiety some people have with this. I actually was interested in this field BECAUSE it's advancing at a quick rate.