If you had looked a couple of days ago, the UK (for example) would have been a lot greener as the wind was blowing. Today is especially bad for wind which, unfortunately, does mean more gas.
And I'll bet money that, couple of days ago, the carbon put out by the spinning reserve that is necessary to cover a day like today wasn't counted.
If you're going to advocate for wind, great. Can we examine your plans honestly, please? Because if you want to deliver an equivalent service to France, one where "SLA" and "disconnect the customers if convenient" are treated as different things, then our current plan is not wind. It is gas.
But, if you insist . . .
The gas required for standby is miniscule compared to what is burned under load, and frankly, I would bet money that wind was curtailed before "wasting" any gas. Even if we burn gas today, gas not burned two days ago, was not burned. So, it is nonsense to dismiss the benefits of wind.
I do not know what the future picture will look like, but given the relative cheapness of wind generation, I suspect there will be a significant over capacity installed. Grid storage is also coming along. New interconnects are being installed such as the North Sea link to Norway. We are currently importing 1.4GW from Norwegian hydroelectric. I suspect wind energy was exported to Norway when it was blowing. And yes, more nuclear is being built, in the form of Hinckley Point C.
A near future thing might be lots of EVs with vehicle to grid capability adding a lot of battery to the grid. Millions of EVs would provide some non trivial amount of capacity. Several manufacturers are starting to supply cars with this capability (e.g. Ford, Kia, and a few others). And of course Tesla is already experimenting with virtual power plants as well.
The future is going to be a messy process of different countries and companies rolling out bits and pieces of infrastructure and technology as it becomes available. It's a fiercely competitive space and it does not favor players that depend on costly solutions that require high energy prices to be economically sustainable. All that will happen in a market with an increasing amount of variety of supply and greater fluctuations in pricing.
This actually has a re-enforcing effect. The more wind, solar, and battery comes online, the less profitable gas plants become. They only generate revenue when they are in use but they still cost money when they aren't producing. Likewise, exporting nuclear energy is not a thing when there is a surplus of cheap renewable energy unless you basically sell the energy at a loss. And turning a nuclear plant off takes a lot of planning. And turning them back on is of course expensive as well.
That's one of the issues France is facing with its domestic nuclear production. It's often cheaper to import wind power from abroad and with a connected grid, power suppliers have the freedom to do so. And of course in areas where prices are higher, home owners are incentivized to find ways to reduce their energy prices by installing solar on their roofs and adding batteries to their house.