I notice in your signature that you are running cassettes in all three systems!
I assume you never stopped using them, so wonder how you manage your cassettes over decades. Do you find the old ones failing? If so, what type of lifespan do you experience with a cassette.
I ask because I have a ton of cassettes from the early 80's in storage that I suspect are trash. I assume the tape has become somewhat brittle and there would be oxidation of the magnetic particles.