Perhaps I simplified your question, but for me, every important digital "thing" I have is stored in my paid Dropbox account (2TB). I believe that as a rule of thumb, private tech companies invent and upgrade new technologies to make their product better, and a company like Dropbox is surely thinking of this. In my Dropbox account, I have EXE files of small programs I wrote in Visual Basic 20 years ago, and they still work after being stored there for at least 12 years. Good luck.