MOSFET Amplifier: Maximum Signal Swing without Clipping
Make all resistors 1Meg Ohm. Then go back and increase RG1 to 2meg Ohm. Define Vthreshold as zero volts. Define VDD as 10 volts. You will find Vdrain sitting at 2/3 of VDD or 6.6 volts. Your "linear swing", or swing with some small clipping, will be 6.6volts +- 3.3 volts. Approximately.

This works, approximately, for FETS and bipolars.