so the magic wasn´t anywhere else, the magic consisted in what happened any single day at anytime because those choices are what made the magic possible. Destiny did come to them at certain points sure...but in the end, they chose their own path.

The mane 6 will have the same mythology like the pillars did for this generation and so it will get written. Perhaps the greatest impact of lore isn´t translated by watching the episodes themselves but by imagining that you are a random character, grab a book of history, learning about the past.

Then, that character will realize how much its life has been impacted because of the changes made and the ambient around him. For that character, seeing a kirin or a dragon in Ponyville or Canterlot might look absolutely natural for them when in reality, that didn´t happen and only three races of ponies managed to live together in order to move forward...

but that didn´t stop there and the mane 6 basically represent how everyone helped them when Equestria got a coup in The Ending of the End, forging the basis of an entire nation without realizing it.

All that I am saying looks obvious but if generation 5 happened years beyond this period of time, those new characters would take into account these achievements over the course of their lives. They will try to replicate these steps or even idolize the mane 6, bringing inspiration and stories to share between them.