No, this is completely different. Windows Phone 7 to Windows Phone 8 needed completely different hardware. Windows Phone 8 to Windows 10 Mobile, though, Microsoft was all in to give it to everyone. HOWEVER, Windows Insiders spoke truthfully, gave honest feedback, and said, "Look, Windows 10 Mobile just does NOT work on my phone as much as I want it to," and after months of trying, pushing the upgrade from the end of 2015 to a couple days ago, which is about 3-4 months of optimizations to get it working, the feedback didn't change. Insiders still gave the same feedback, "These upgrades aren't working well on our phones."
So after months of dedicated work, pushing the upgrade further and further back, Microsoft finally said, "Hey, look, we tried, and we're sorry, but there's no more time, we need to start on the next set of upgrades now. That'll do for all the feedback, thank you for the help, and with a sad goodbye, we applaud all of your feedback," which instead of making some normal, every day customers upset, decided to cancel the upgrade all together.
Time ran out, and the feedback didn't improve enough, even though the performance did. Sorry, everyone tried.