No. If everyone were on Linux and there was a breaking change introduced by a third-party there would be similar problems.
The problem is that critical infrastructure isn’t treated like critical infrastructure. If something you rely on can go down due to a single point of failure, maybe don’t fucking use it?! Have backups, have systems that can replace those systems, have contingency! Slapping Windows on to a small machine and running some shitty Chromium app to work as a cash register is a fucking stupid idea when you consider that it is responsible for your whole income.
The problem was never Windows. It was companies that were too cheap to have contingency, because an event like this was considered extraordinary and not worth investing in.