OK, I just took a look at Stardock's products, and Start10 would be the only one I'd be interested in, so I'm glad to see there's software to recreate how I prefer to work. I don't have my apps listed alphabetically, but more in groups, such as my usual 2D apps, and then my 3D apps, and then a couple/three games at the bottom of the list.
For those I don't use that often, I use the All Programs link at the bottom, and those are all set up in groups as well, so I never have a problem finding what I need quickly. It's how I had my Start Menu set up with WinXP, so I've been so used to this setup, I wouldn't do well with any other.
The apps list in Win10 is shortcuts and folders that can be changed and reorganized, just like every version of the start menu. However, it's not quite as easy to manage. There's no drag-drop support anymore, so you'll have to manually create folders and move the shortcuts yourself.
These files are in the same place as Win7. Apps installed for "all users" are in
%AllUsersProfile%\Microsoft\Windows\Start Menu\Programs
and user apps are in
%AppData%\Microsoft\Windows\Start Menu\Programs
Win10 also has a new app format that buries it's files in the system, so I'm not sure where those shortcuts are hiding.
To get direct access to these hidden folders, just copy and paste the path into the start menu. It'll load File Explorer with the correct location for you.
Then, just create the new folders you want, such as 3D or Utilities, and move the shortcuts to the new locations. When you're done, you can delete the empty folders or other useless cruft. Keep in mind, however, that anything in the folder for "all users" will effect all users. There's two other caveats.
1) You can't have nested folders. They won't show up and all of the shortcuts in them will be listed in the parent folder. (Anyone who remembers Win3.1 will understand what a pain that is. However, too many companies needlessly abused nested folders, so Microsoft simply did away with them.)
2) You can't move Win10 apps. They're stuck where they are.