I have bad anxiety and a stressful job, I have found that in addition to HIT type training really hammers my CNS and makes my cortisol go through the roof. It got so bad that I actually had to be medicated to drop my cortisol levels. I couldn't sleep for 4 days straight even though I was exhausted, my body was in full survival mode.
When I switched back to higher volume with short rest periods, my cortisol levels stabilized and I was able to come off the medication.
This type of training has me feeling spent but good when I leave the gym, instead of feeling like I got ran over by a truck. My BP and HR dropped too.
I think that people who handle stress very well and have sedentary jobs can get away with training hard to failure most of the time. Unfortunately, I am not one of them.
For me, HIT style training helped me progress in strength much better than volume, but growth was not as good.