The big advantage when you convert a propane gas grill to natural gas is the infinite supply of gas. You will never run out of natural gas while you are in the midst of cooking those steaks or ribs as you occasionally do when using propane gas. Of course you have to have a supply of natural gas available. If you do not have natural gas in your house, you will probably not be able to convert from propane gas. It would be cost prohibitive.
Converting from propane gas to natural gas requires the changing of the gas grill’s orifices from propane orifices to natural gas orifices. The natural gas orifices have a larger opening than the propane orifices because natural gas is transmitted with less pressure that propane gas in a tank.
Once you do convert your gas grill from propane gas to natural gas, you will love it. No more need to check the level of propane gas and wonder if it is sufficient to grill the steaks.