They should be upgrading the grid as the population and demand for electricity increases ahead of time. This is how it works in the tech world. We set the base for the upgrade and then commit to the upgrade with fall back / disaster recovery plan.
Check when the last time an installed utility performed maintenance. Now you want them to turn things off while they put in new hardware? The only thing that will drive a business to make that kind of change is if the money is behind it, which will happen when EVs are much more prevalent.
Why would they need to turn anything off? That’s not how they expand capacity in the Netherlands. Why would it be needed?
Not from all the profits made by all the people using electricity and paying for electricity? And electrical grid has redundancy. You can take down primary and secondary takes over temporarily.