You will likely see this terminology in listings from or modding services on platforms like Facebook Marketplace or specialist forums. Sellers use these "solid features" to demonstrate that the console is "online ready" with mod menus and a library of tested games already installed.
The phrase typically refers to the Disney Bolt Disney Bolt [Jtag/RGH]
is the modern standard used on most console versions to achieve the same result: running custom dashboards and playing backup games. You will likely see this terminology in listings