Confused about Tech stack

I am a Backend engineer with almost 3 year of experience in Java, SpringBoot. Lately around 6 months back I got a project where we were integrating multiple LLM models to the application and tech stack used is Python, FastAPI. Also I am working on creating multi agentic application. Now I feel my Handson experience on springBoot and Java is getting reduced because of the change in stack. I am confused if I should switch back to Java or go with this multi agentic application development which is a hot topic and everyone is talking about this. Need suggestion if I am into right path or I should roll back to my old domain.