Look at the Steam Deck as an example:
- Linux is preinstalled
- Integrated hardware and software
- Immutable OS that is very hard to bork
- UI is Windows-like which is familiar to the target market
- Good value for the price
- Offered by a well-known and well-liked brand
- Marketed and advertised to the target market
We need more Linux devices like this to gain market share.
Like many GUIs it makes it so you don’t have to remember and type a bunch of commands to carry out basic tasks. I especially find it convenient for checking logs. But no unique functionality compared to CLI. So it’s a matter of preference.