YouTube disappears from Samsung Smart TV...

This happenned on our Samsung Model UN46F7500AF Smart TV purchased in 2013 but the Model began selling in 2012. Speaking to the Samsung support team in USA gives me the feeling that YouTube created a new platform and that the older Samsung Smart TV (Prior to 2012) does not support the new YouTube platform.

I will have to pursue this matter with YouTube site for confirmation. In Summary, the reason YouTube disappeared is not because of Samsung, but because of YouTube's changes.

Why buy a PC, all you need is this phone...

You get the PC-like experience by connecting your phone to a Microsoft Display Dock and connect a monitor and keyboard to it. This is possible because of the Continuum feature in Windows 10. Of course your phone functionality is not compromised and you can still attend to your calls.
Microsoft Display Dock is offered free with Lumia 950XL  available at Microsoft Stores.