Ask HN: General development career advice?

My employer has a variety of tech stacks. From wodpress to drupal to kentico and there are a few android apps as well. Technology platforms are chosen from client needs. There are dozens of clients. I have learned a lot from working on various projects, but I am not enough expert to really feel a master of any.

Looking years ahead, I mm not sure if this is my best professional path. I am grateful for career advice from people who have worked in general development without specializing. Is it a long term risk to a programming career?