Although some things of down document will be outdated soon after publishing, the main thoughts behind the article stays valid. You have to do some analysis before deciding which kind of farm to choose. This analysis will stay the same now and in the near future concerning the amount of Azure VM's or Gallery machines you need to answer a certain farm question within your company. What will change drastically will be the prices and license model. But this document can be an example on how to start the analysis and take the road ahead (Bill Gates, 1994) from there.
Jaap Zwart MA, BICT