I did 135 hour week once as a journalism intern. got fired because I didn't do 140 (would walk to hotel, sleep 4 hours, wake up, walk back to field office - "wow," you think, "what war was he covering?" and the answer is the war of an arts festival in northern england).
Good stuff. I worked crazy like that once before too, during the Kaseya ransomware breach. Was the specialist rebuilding functioning AD and recovery efforts in over 50 companies that month. It was a wild time, everything was on fire, so it was constant triage and scary recoveries (some lost absolutely everything - test your backups folks)
Would 100% do it again but like you mentioned you knew it was very temporary. Doing that long term is insanity