No, Windows.old is what Windows 10 will use to roll back to the previous build prior to a major update for the 14-day period (I think, it might be 10) where the OS allows that. It is not a recovery partition.
Also, if you're talking about a Windows 10 machine that is the result of an upgrade from Windows 7, 8/8.1, would you really want the manufacturer recovery partition anyway? Even if it's a machine that had Windows 10 "out of the box," after you've spent tons of time customizing it and, I presume, taking system image backups as needed would you ever really want the manufacturer recovery partition?
After all, once a machine has been licensed for Windows 10 that digital entitlement is held on Microsoft's servers and you can completely wipe the machine and reinstall Windows 10 from scratch, in its latest Version, if you so desired.
The whole concept of a recovery partition is, by and large, a pre-Windows 10 concept unless you would really prefer to be able to restore the machine to the original "out of the box" state.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134
In a modern society where everyone thinks their opinion deserves to be heard nothing annoys me more than individuals who mistake their personal preferences for fact.
~ Commenter TheCruyffGurn on the The Guardian website, 8/13/2014