1) Improved thermal retention using the patented 'nefarious foldover maneuver', which is explained below.
2) Using free form does not apply any undue pressure on the body, since the sheets/blankets are not anchored down.
3) Allows for another patented maneuver, the blanket roll-up, for especially cold nights.
It is obvious that it's time for tucking in blankets/sheets to go the way of the sober high school principal. Come on, it's the 21st century!!
Nefarious foldover maneuver:
Lay down in desired position. Lift feet high off of the mattress, wait for the sheet/blanket to curl back under your feet, then bring them back down, completely surrounding your feet and lower legs. This affords a much more comfortable, draft free foot environment.