It is not just the price - which might be OK for someone who uses it for several hours per day in a paid job but less palatable for those who don't get paid for their work or who only occasionally need it - but the mere fact that you need to get a license to use it instead of just downloading the thing and firing it up. It is one more step to take, one more thing to go wrong, one more dependency over free software. Given the prevalence of licensing conflicts and the stiff penalties demanded by copyright holders over such issues I tend to go out of my way to avoid exposure to such issues and use free software whenever feasible.
