I guess I have a different point of view. The new Windows 10 Menu is sufficiently productive for me to relinquish my need for Start8. If Start10 is no more than a paid upgrade of bug fixes to Start8 then I am content to keep my money and use the Windows 10 menu. Though I suspect some people aren't flexible enough to make the change and still need to see the Win7 style menu. My own wife would be such a person 
At least I found that all out before paying for Start10 on my own system.
Kudos to Stardock for providing the best transition mechanism with Start8 on Win8. Sadly after years of using various Stardock products, Start8 was the last vestige of their software on my computers. So I guess I'll be signing off soon.