I've deadlifted 4x/week at times, hit a 15lb PR after 1 week, jus sayin... to be fair one day was trap bar, one was "speed" deads paused at the knees, one was over 90%, and the other was a max pull.
Yeah, which is absolutely understandable. If you were maxing out every session (true 1RM), that would have been gruesome.
Keeping the pulls below 85% for the most part will allow for a higher frequency, which is how the powerlifting template of the Broz method came to be (comprising primarily of speed pulls, perhaps 2-3 max-outs per year).