I have had the same yahoo email for over 20 years. My computer crashed yesterday and cookies were lost. Hubby was able to get it back up and running. I have had great luck with everything except yahoo. I run family yahoo groups, genealogy groups. I had many, many folders with saved emails.
NOTE: My problem is that I had not updated a backup email and cell phone number.
There are thousands, probably millions of complaints online from people who are in my exact situation.
I am still in shock as I continue to remember additional things that I have lost!