so it all boils down to

you can't write books, treasure maps and so on because they are not persisted,

The thing is, I've been giving some thought to 'emersive rollplaying' and 'evil' Vs 'good'

There basicaly is no actual emersive experience as there are no consequences,
you can never ever change the world, because NPC's are immortal and static and the landscape fixed,
you can't ever become  a 'Hero' or a 'Sage' or even 'Famous' on the long term because as soon the server reboots all you did is gone,
you can't make a work or contribution to the world from within the roleplay, you can't write to the wall, you can't write a book, as it all goes away

if you want to make a contribution to the game, you either leave it and become a developer or you make something that solely consists of player (guild, settlement or something)

I, as a character in the game, would like to be a philosopher, and write a series of books, be a loner and see if what I leave lives after me,
unfortunately that is not possible

So all on all I think there should be at least some chance to leave a mark, otherwise every truly emerisve roleplayer should be a Kafkian depersed madman or a party animal because he has true proof his life is pointless