FBI's (recently fired) James Comey has been asking for an encryption backdoor for the past 3 years:
2014: https://www.fbi.gov/news/speeches/going-dark-are-technology-...
At that time, he said unbreakable encryption should be illegal: http://www.newsweek.com/going-not-so-bright-fbi-director-jam...
2015 (asking for a backdoor): https://www.theguardian.com/technology/2015/jul/08/fbi-chief...
2016 (same): https://arstechnica.com/tech-policy/2016/03/fbi-is-asking-co...
2016 (tried to force apple to create a backdoor for the iphone): https://www.apple.com/customer-letter/
And then here recently, he's upped it to an international agreement to create a backdoor: https://www.techdirt.com/articles/20170327/10121437009/james...
He's not the first, only, or last person to ask for it.
A couple of bad business decisions and they are where yahoo is today. So be smart about how you use these services and educate the non-technical folks around you.
Since email in the modern world has this type of importance, what should I do? If you say gmail can't protect their data forever, do I not use gmail for email? What do I use then? No service will be free from data leakage, even an email server I run myself.
Deleting all my email would be a big cost to pay for a gain that I can't exactly quantify; I would have to figure out the likelihood of my data being leaked over time and the cost to me if the data was leaked. That isn't readily obvious what the risk factor is for me, but I KNOW the cost factor.
Distribute risk. Use multiple accounts. Don't handle all work/financial stuff on a single account. Keep work and personal accounts separate. Reduce the number of hours you spend online being a data milch cow for these corps. This automatically reduces dependence. Don't allow messenger chat transcript backups to happen by just uninstalling the app every other night. Don't restore any saved transcripts on disk on reinstall.
I could go on and on but basic rule is use your imagination. Don't use these tools the way they want you to use them. Use them as you would use a tool in a workshed as an aid, not as a drug you are dependent on.
Sad that managing our own multi device services is so time consuming.