[sh461]

You're kind of conflating two different types of career change - switching tech stacks vs switching the domain in which you work. You could switch to a different web framework if you think Angular is becoming irrelevant (same domain, different tech stack). Or you could look for companies that run their ML on Java (familar tech stack, different domain). Yes, those companies do exist.

With either of those your past experience carries over to some extent. But if you decide that you want to be a data scientist and use Python, then you're putting yourself at massive disadvantage. First, because your past experience is far less relevant. Second, because there's a huge oversupply of beginner data science/ML people who use Python.