MYTH: Open source tools are buggy.
Does software have bugs? Of course. It was made by humans! But open source has the benefit of a strong community that can crowdsource fixes because the code base is not proprietary (open source!) And, by the way, If you have been using the most popular proprietary GIS software (wink,wink) for more than 5 years, you know all about bugs.
MYTH: Free GIS software has a limited toolbox for analysis.
Well this depends. Let’s refer to the 80/20 rule here. When applied to GIS, 80% of your analysis can be processed with 20% of the tools / algorithms available for a spatially enabled database. If you are a bada$$ spatial stats expert and love your proprietary tools, then by all means stick with that expensive stack (also take a look at PySAL). But if you are like most of us (roughly 80%), you can accomplish your analysis with the FREE stack.
MYTH: Open source tools are impossible to install and administer.
Granted, this has been true in the past. But the open source community has made great strides in creating tools that don’t require you to have an engineering degree to stand-up a fully functioning GIS stack. And, because the community is large (and committed), you can find a ton of tutorials and documentation on the web.
MYTH: PostGIS is fine for hobbyists, but it can’t support corporate needs.
Actually, more and more companies and government agencies are turning to PostgreSQL/PostGIS for their geospatial needs: Uber, FourSquare, NOAA, and Carto just to name a few.
Just think of all the cool stuff you can buy from the Public Lab with the money you will save…