That you did. I have the same problem. Dealing with fires on my own systems which probably generate more than 5 mill a year will keep you “specialized” for a while.
Take time to catch up with the current technology. It is too easy to become complacent in your specialization, then suddenly unemployable when that special focus is eclipsed by something better in the marketplace. Marshall Rose often referred to the phenomenon as "overcome by events". In the software development business, the reward for a job well done is often unemployment.