>We also should not use it to replace gas or oil heating in places connected to the power grid. That is way better served with heat pumps powered from the grid.

Some of us are not so lucky. We would *love* to use a heat pump in our home, but it would mean gutting a 200+ year old house and replacing the entire heating system.

Not only is that expensive, but I would have to work out what the environmental cost of that renovation is (as well as tossing out perfectly fine components) compared to the savings of getting a heat pump.

Now, if I were able to simply modify the boiler, then things become a bunch easier to calculate.

So sure, new houses should definitely go with heat pumps. But there are millions of houses that simply cannot make this level of renovation without defeating the purpose. Hydrogen might be really good here.