Some super basic questions, here:

How much attention do you devote to training by feel? Very little. It just happens if you use your devices but pay attention to what your body is telling you each day.

Is it something you do alongside your training devices? Yes, absolutely

Is it something you do despite your training devices?

Do you think it's a useful skill? Yes, I’ve had devices crap out for one reason or another on race day

Do you wish you were better at it? No, I’m fine with it.

Do you think it's not pertinent at all in the age of devices? It’s very pertinent. Good example...your legs are dead tired and you are worn out from previous training a bit. For me, That training state would often result in a low HR for me—ie I can’t even get it up high if I wanted to. If you go strictly by device, it would suggest I should run faster or bike harder, but that won’t be possible or will be very hard or a bad idea. So, I pay attention to what body is telling me in conjunction with devices.

Thank you!