As a person who was responsible for hiring in a previous role and I still sit on a lot of technical interviews, I didn’t care if you were “limited” to the stack we were using as long as you could get the job done without six months to a year of training.

If you started your career learning Java 20 years ago and you kept up with the latest trends of Java, you could still find a job now. The same is true for C# around 15 years ago.