The problem with the DN lifestyle is that everyone marketing it hard has a vested interest (they run some product/service tied to the DN lifestyle).
For everyone else that wants to get their feet wet in this type of living, they soon realize that things get expensive really quickly (this applies to everywhere except South East Asia).
You just need to account for plane tickets, visas and short-term rent alone to see how it is expensive.
Also, the article conflates "work from home" with "digital nomad", which aren't exactly the same thing.