It's an interesting article but I'm not sure that the conclusion is correct. The existence of a similar or superior open source solution does not guarantee that

It's an interesting article but I'm not sure that the conclusion is correct. The existence of a similar or superior open source solution does not guarantee that a proprietary solution will lose most of its users to that open source alternative; especially if there are network effects at play. Also, when it comes to B2B solutions, network effects have a massive effect on the procurement process. The people who decide what software a large company should buy/use are more likely to buy from their friends' companies (or they might get some kind of kickback payment or job offer down the line)... So there is no incentive for insiders to use the free solution no matter how good it is.