I just want to add that in many cases you don't even have to get rid of your software that you already own, let's say you own ESRI software but don't have extensions available since you didn't buy those. You can compliment that by using QGIS.
My mantra is always to use the best tool for the job, it doesn't matter if its free or not. Of course you may have restrictions in terms of what you can use and then you will need to work with what you have available and at your disposal.
I just want to add that in many cases you don't even have to get rid of your software that you already own, let's say you own ESRI software but don't have extensions available since you didn't buy those. You can compliment that by using QGIS.
My mantra is always to use the best tool for the job, it doesn't matter if its free or not. Of course you may have restrictions in terms of what you can use and then you will need to work with what you have available and at your disposal.