Companies come and go
Yes, as we've all seen having a local hard backup is a bad idea. Just ask the people who've been hit with ransomware.
You're mixing banks, school, fed taxing authorities who have a vested interest in storing your data with your useless-to-anybody-but-you personal email, calendar, photos and 'likes'. If you want to store your personal shit with a company that may/will change hands, fees, limits, terms of use, etc. have at it.
From someone who's seen companies live and die before the time you've been peeing in your huggies, I'll keep my personal data where I can control it.
Biting the hand that feeds IT
