“the risk posed to digital independence by being locked into a single proprietary architecture”
The point of the article is about how much it is going to cost to switch from one to another, they are already locked into LibreOffice, etc and are paying the price to switch to an alternative. You may think because it’s a free world, open source, and not Microsoft that LibreOffice is the perfect digital independence option, but it is just as constrained as every other offering.
You back a horse. You might not have to pay to ride the horse, but you’re certainly going to have to pay to get off the horse.