I got very deep into a niche business domain area for over a decade, but got bored with it and more recently branched out to a completely new and broad domain a

I got very deep into a niche business domain area for over a decade, but got bored with it and more recently branched out to a completely new and broad domain area that uses the same cloud provider and similar tech as the old one. I figured I can always go back to the old one of needed. It's good for job security I guess Business domain is another dimension to consider besides tech generalist or specialist. What is the problem you are trying to solve, and how do you know it's the right problem to solve? That can be a lot harder to do than the tech side.