> I wrote an export script for the mail system I was using at the time and imported 10 years of mail into gmail.
> I don't think so though; people are lazy and if the default status is that you can keep everything you have anyway
My, old person who grew up in the 80s, case versus people I know and talk to who are <= 20 y/o now.
> In the U.S., I find from a legal perspective that the less documentation you have the better. etc
This particular thing was a large project, paid for by a gov grant (not sure if that's the correct word, but I think it means the same) early and ran from 2001-2009; the grant was for millions. A few years ago, suddenly they came to check on the project; see if all paperwork is in order, hours written etc. Now during one of the office moves, someone misplaced the actual paperwork we prepared for this including CDs with source code, revision history etc (Now only if there was some kind of storage on internet to store this on...). We would have to pay that money back + fines if we cannot actually prove we did the work and who did it. In your case, we would've had to pay the money/fines, because outside my mail, there was no way to prove anything. And these gov checkups come years and years after the fact.
Granted; this was a stupid mistake of someone who thought the boxes were full of outdated crap, maybe even an external mover, however, I don't see the downside with keeping everything in this case. Especially if you have a company. In the US you have all kinds of legal issues; I understand that, we don't have that really, so worrying that someone will check your mail, even in courtcases, is not very likely.