can you clear my doubt.... I've learned that lack of rem sleep is the main concern for health , when we sleep less... But you said that theta is essentially rem , so why can't we replace actual sleep with these power naps?? I know I sound crazy but I've a competitive exam on nov24 to which 0.2 million candidates have applied....and I'm hoping to do a good job....also can you create  music that we can use while studying??? I really love your channel.... Keep up the good work!
There are actually two very important sleep stages: SWS and REM. You need both. Sleeping ONLY in naps is super-difficult and very few people can do it long-term.
As far as studying goes, you're in luck! I already have a study track :) https://youtu.be/eqKQACO4HAk
Bhargav Krishna