I sometimes deadlift without shoes but as long as I’m wearing flat soles, like chucks or a crossfit sneaker I’m okay with keeping them on. Straps are a no lift in comp, obviously, but sometimes I’ll use straps for say 6x495 because while I know I have the grip strength for 600, I don’t have six reps at 500, so I can’t get the progressive overload to continue improving. Same for my dumbbell rows. My grip can handle about 100lbs for reps but my lats can handle 125, so in order to get the heaviest sets in I’ll use straps. They’re used very sparingly throughout my work though.