If you make the switch, you won’t be able to go back to Windows 10 in S mode.
If you want to install an app that isn’t available in the Microsoft Store, you’ll need to switch out of S mode. Windows 10 in S mode is designed for security and performance, exclusively running apps from the Microsoft Store.
This is what Microsoft says about S mode… If it doesn’t come from the Microsoft Store – you can’t install it on a Windows 10 S mode computer. That means you can’t install Google Chrome, Emsisoft Antimalware, Mozilla Firefox, OE Classic Email, Thunderbird Email, etc. As you may not know, Windows 10 S mode users are limited to using apps and programs from the Microsoft Store only. Why Microsoft even offers S mode is a good question.
We have recently noticed that more Windows users with new computers are stuck in Windows 10 Home “S” mode.