I'm a freelancer in data engineering / machine learning engineer. I've so far never held a role that I had the technical skills for (well... I do have the under

I'm a freelancer in data engineering / machine learning engineer. I've so far never held a role that I had the technical skills for (well... I do have the underlying knowledge, but not the particular frameworks/tools), because every time my freelance project ends and I'm looking for the next one, the tools have already changed to something else that is hip. Or the go-to architecture is now a different one. Or the way you deploy it all is completely different. It's pretty frustrating. I keep trying to do courses to keep my skills up-to-date, but it doesn't matter. Those courses by themselves are already outdated a year later. The only things that have been solid in my career, is the CS knowledge and theoretical knowledge from books like 'designing data intensive applications'. That stuff rarely changes. The rest is like waves in a sea. They come and go.