Sure, I use a lab and have my B&W film developed "normal" unless it's an extreme situation. But I can still use Zone System concepts in determining my exposure for both color and B&W film.
Granted I haven't done the film speed tests and I scan my negatives, but I still know that Zone 5 is middle grey and that my Portra 400NC will hold detail to Zone 8.5 to 9 and I can still get a little shadow detail out of Zone 2.5. If I didn't have an awareness of how many stops of range I have to work with, and just trusted my meter, there are a lot of situations where I'd be off by several stops.
Even with my slop factor, this way I am only half-stop "off" in most situations.
I think a lot of experienced photographers use these aspects of the Zone System without even realizing that it is the Zone System. It doesn't matter what you call it, you need to have a approximate idea of your film's range and the scene's range, and figure out how to compress or expand the scene's tones into your film's ability to capture them.
And yes, "In the Day" I did the whole works with a densitomer, Selectol-Soft, Plus and Minus development, etc. All good training no matter what.
There is an old Fred Picker book on the Zone System that explains it all very clearly and simply. Some of the other texts are way to nerdy and complicated.