>>/7755/
> I've played it various ways. It seems the show writers were certainly thinking they live more than a hundred years. 

I have thought about it too from various angles and swayed back and forth over the years. Part of me thinks them living at least a little longer would make sense in a lot of areas, from the timing of certain flashbacks to how multiple, albeit, usually magically inclined seem to have pretty lengthy lifespans. If the world is magic and magic grants longevity then it would be a no brainier to have it apply on a smaller scale to some of the regular ponies as well. 

Though it also creates some issues. In particular, if ponies can live too much longer then a hundred it makes everypony forgetting about Nightmare Moon make even less sense. 

> I know that the CB universe asserts ponies live to be about 300 or so, which would be in keeping with the changes seen in that episode though CB lore is much older, as I recall, than the original Conversion Bureau

Funny enough, whenever I think of a fic that has that in play I recall a dark Rarity serial killer fic about her and the ramifications for her family, in particular Sweetie Belle, with SB having her own foal fully grown up and going through the same process and the author was saying after, what, 40+ years the mane 6 were just starting to enter middle age. Don't know why I associate it with that one but I do. 

> universe asserts ponies live to be about 300 or so

“Yes,”  replied  the  old  lady,  “they  must  also  die,  and  their  term  oflife  is  even  shorter  than  ours.  We  sometimes  live  to  three  hundredyears, but when we cease to exist here we only become the foam onthe surface of the water, and we have not even a grave down hereof  those  we  love.  We  have  not  immortal  souls,  we  shall  never  liveagain;  but,  like  the  green  sea-weed,  when  once  it  has  been  cut  off,we can never flourish more. Human beings, on the contrary, have asoul  which  lives  forever,  lives  after  the  body  has  been  turned  todust.  It  rises  up  through  the  clear,  pure  air  beyond  the  glitteringstars.  As  we  rise  out  of  the  water,  and  behold  all  the  land  of  theearth,  so  do  they  rise  to  unknown  and  glorious  regions  which  weshall never see.”
Original Little Mermaid. Just a coincidence no doubt but it does bring to mind a possible interesting thematic element with that.  and kind of horrifying and sad 

>  This way you can have those issues come up without needing to go to space.

True. Though by the time I would be through with it I could see myself getting focused solely on those aspects and completely separated from the prompt.  

>  Yes.

More yes.