Also, solar is now both cheaper and safer.
And just for comparison in france nuclear power plants provides 37% of energy
[1] https://ourworldindata.org/grapher/energy-consumption-by-sou...
They think the horrific inefficiency of fossil fuels in these uses makes progress look slow and futile as it massively inflates the total energy usage.
In reality, once we get the easy bits of renewable electricity done and are at 80% carbon free electricity, these other markets let us avoid the hard part of getting to 100% clean energy but still make rapid progress on decarbonisation.
An EV or heat pump running on mostly clean energy is a 5 or 6x improvement in carbon even before you account for the grid benefits of having such a large amount of battery and heat storage attached to the grid.
I'm also not sure if heat pump is a solution for multifamily apartments.
no, it doesn't require good isolation. Good isolation is beneficial, like for type of heating.
Radiators don't have an effect on isolation. However, modern radiators usually have a way higher surface area, which allows heating rooms with lower water temperature.
Heat pumps are more efficient if the difference between source and target temperature is closer.