We'll see how 'meaningful' your existence is when you snuff it and your 50 years of obsessively stored emails documenting your 'meaningful existence' are flushed down the wazoo with the press of a key by some relative keen to have your laptop. Yes, nobody gives a fuck about your emails but you; when you're gone nobody is going to be poring over them, rifling through them trying to piece together your illustrious and unforgettable existence.
They'll be deleted and forgotten before your coffin lid is closed.
Save them the bother and delete as you go I say!