The theoretical advantage of this approach is that it may not present many new problems due to the lighter nature of the information.
It is necessary to install the optional updates this week (KB4568831) because these are add new features to the operating system. If you still do not want to, you can wait until Patch Tuesday of this month and get access to the new features. Microsoft will release the next security updates on August 11, 2020.
To activate the features of Windows 10 from the 2009 version to the 2004 version you will need to make two changes to the registry.
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FeatureManagement\Overrides\0\2093230218] "EnabledState"=dword:00000002 "EnabledStateOptions"=dword:00000000
You can do this manually by following the path above, or create your own registry file or download the following ready-made file to run it on your system after exporting it.
Download the finished file:
Restart your device after the change and you will notice that you already have the new Start menu. The new Start menu will change the background of the tiles in the theme and will significantly reduce the colors.
Another new feature that will be available after the change in the Registry is that the Edge tabs will appear in the Alt-Tab dialog box. Alt-Tab displays open program windows by default, and Microsoft has modified the functionality to include tabs from the new Microsoft Edge browser when using the shortcut.
The Settings application has options for changing the behavior of the Alt-Tab tab. Follow the path Settings - System - Multiple Tasks and change the Alt + Tab setting.
If you want to undo the change delete the keys you created in the registry and restart your system.