So what happens when my Person account gets compromised? I'll stick to my many accounts / many passwords approach, I think.
Use 2 factor auth to mitigate that? To me that seems safer than having 100s of different accounts with no support for 2 auth.
Any account will be compromised - it's only a matter of time. When that happens, it's best (as recent articles in Wired, Ars Technica and others demonstrate) to have a broad account "ecosystem".