don't get me wrong, I believe that your ranking is correct and in that regard,it can perfectly applied. There was more lore introduced after the Twilight's new status as an alicorn and both S4 and S7 did contribute the most.
However,I intended to express that despite the quanitities of lore introdcued,they became more practical or subtle enough to work as another element for a slice of life episode (that in other series would be seen as filler) and even the characters change the lore because of their actions or even gets lost within time (it doesn't diminish their relevancy on the show though).
Season 8 (and to a lesser degree,the 9th season)is perhaps the biggest turning point at bringing everything together into one pack,making it less weird for everyone and encourages to move forward as if nothing happened despite all the advancements brought in the middle of the process. Between Dusk and Dawn (the song especially) represents the biggest culmination of what I am trying to convey here.
Sure there was more lore to exploit out there but the quantities looked minor in comparison because there was not much else to discover beyond what we got and those new introductions felt like little drops of fresh water into a fully defined ocean so familiar for everyone that felt like home. So diverse yet so typical to see every single day.
Having said this,I think that I am ready to say good night to this board.
