I have no idea why you'd think that Win10 Home would be going away. The Home and Pro split has been around forever and Microsoft includes same in all their Windows 10 marketing. The vast majority of non-business-focused computers you can buy out there come loaded with Win10 Home.
I would have to imagine that at some point Microsoft will disable the free upgrade from continuing to work. That's what they've been saying all along, and it is an enticement for those who want to upgrade but would prefer not to pay. My gut tells me that the free upgrade period is likely to be extended beyond the end of July 2016, but a gut feeling is all that is. I don't think that the free upgrade is going to last forever, whether one is using a Home or Pro (or Pro-variant) of Windows 7 or 8/8.1.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134
Memory is a crazy woman that hoards rags and throws away food.
~ Austin O'Malley