Free software is to natural public lands as commercial software is to amusement parks.
Free software: is based on open standards, which leads to freedom and longevity of data. Developers must play by open standards so as not to spoil the landscape for everyone else.
Commercial software: must be paid for, and you get whiz-bang flash for your money. But your rides are limited, and all you can take away from the experience after you stop paying money are photos (printouts) and memories.
