I have two dozen personal online accounts, each requiring a password with its own unique requirements, although when possible I try to use the same password for everything.
For work I have a dozen systems I have to log on to, each with its own unique requirements, but those requirements vary so widely that I can't use the same password for any two. The primary system though requires 17 characters of which one must be capitalized, one must be a number and one must be a special character. The one thing they all have in common is that they must all be changed every 30 days. And you can't keep the same one and just change the number...it looks for things like that.
I was telling dad just yesterday, "the world is turning upside down."