I never really thought flaking a main was rocket science, even before all these fancy systems. Get it down and secure anyway you can with a few sail ties until you had time to make it pretty, even in a gale.
Then they started building the center cockpit boats and putting big biminis above them and even at the dock after a sail Spiderman couldn't get up there to make it neat. Finally, someone's granddad showed his grandkid about lazy jacks and sail tech fell backward by about 200 years. WOW!
Then the holes in the sail with strings idea came up and that one never made sense to me, but I sail offshore and fixing things like those little strings, let alone the grommets through the sail, at sea, never appealed to me.
Stackpacs look awful on almost every boat, but I can see it's importance, but probably less than 20% use the zipper part down here, which really, isn't protecting the sail from uv's its main point?
But most of the time, whatever system is used today, so few ever bother to neatly flake the sail after a trip anymore, that I won't be surprised if the word flake is lost from the sailing lexicon in the not too distant future, unless it's used to describe the captain on some other boat acting erratically.