I feel so far behind some times that I'm not even coherent enough to organize old, current, new - people are using so many cloud solutions and even good ole' sql server has so many new options (or options that aren't really new, but new to me), I feel sometimes like a strong imposter syndrome. Then I talk to my son, who feels the same way despite a MS in robotics engineering but because they only 'scratched the surface' of many things he feels the same feeling - it's a real problem in IT, some of these job descriptions are outlandish in scope and you wonder "Are they really going to find a person who knows all those things in detail?"
I don't even know Grouping Sets in sql , some people use it like it's going out of style. My problem is there are so many new things I could learn IF I had an example project to use them on. But time flies and work flies and you sometimes feel like there isn't enough dough in the recipe to learn the new stuff. My new company is all about AWS, Snowflake, Kafka. Thankfully I work in the "company that was bought", which is still 100% sql server based, so there is plenty of work to do, but I always get this nagging feeling I better learn as much new as I can or at least be a Successful Pretender lol