Yes it feels like SQL, HTML, and shell are ubiquitous and powerful technologies that most people think they know, but probably don't. Certainly I could have learned more about them in the first decade of my career. 15 years into it, this knowledge continue to pay dividends.
I like this contrarian advice: rather than chasing the latest new thing, learn SQL, HTML, and shell. They continue to exist because they do things well that Java, Python, and Go don't. I suspect that will still be true in 10 years, so it's a good thing for new engineers to invest in.
(Learning the foundations of git is good too, although the outer layers are arbitrary and nonsensical.)