Complex sentence: Most LXI instruments can be programmed with methods other than IVI, so it's not mandatory to work with an IVI driver; developers can use other driver technologies or work directly with SCPI commands.
Split into simpler sentences: Most LXI instruments can be programmed with methods other than IVI, so it iss not mandatory to work with an IVI driver. Developers can use other driver technologies or work directly with SCPI commands.