As I recall, this sort of public statement is used as a lever to squeeze some discounts out of Microsoft's Enterprise Sales team before the government "decides" to stay with Windows.
Whats worse is they could all pull it off if they invest in existing Distros and hire people to build out the main infrastructure they need. If they rely on legacy Windowd OS' the licenses for new OS' wont matter. They need secure systems to avoid being hacked by external malicious state actors. I would love to see some countries adopting Linux for government systems and funding research and development e.g. maybe fu…
There's a reason Microsoft was successful for years: they built turn-key solutions, and added new turn-key features their customers requested.
Switching from that sort of IT to a linux-based, 'we need a system architect' model doesn't happen overnight. There's organization shift, cultural shift, firing unneeded people who won't retrain, retraining people who are worth it, and hiring talent to fill gaps.
Not to mention that talent's more expensive and less easily certified (e.g. all the official MS rubber stamp programs).
Not impossible, but it's a LOT of work. With dubious chances of success.