Newly built single-family house - gas or air heat pump + photovoltaics + storage?

Yes, but it is about new construction, not 20-year-old gas boilers. Electricity must soon no longer be generated from lignite. So the argument is obsolete, or am I missing something?

Who is actually Rezo? Scientist?

I am also an advocate of heat pumps, but the gas heating should be preferred over the heat pump if the electricity for the heat pump, for example, is generated from lignite.

With pure lignite generation this might (barely) be true, but it is very far from the German electricity mix.

A few numbers on this, starting with electricity:
Lignite: 1093 grams CO2/kWh electricity, Germany mix 2020: 366g/kWh
Even if you directly used the gas to generate electricity, you would end up with just over 400g/kWh
[B]It is foreseeable that it will get better rather than worse.

And here heat (assuming COP of 4):
Using this electricity with a heat pump therefore results in 250g/kWh heat for lignite and 90g/kWh for the current mix.
Direct combustion of gas results in 200g/kWh. So at least twice as much.
It only really gets interesting in combination with renewable electricity, but it is interesting to see that from the CO2 balance it can even be more sensible to generate electricity from gas and then use it in a heat pump than to burn it directly.
[/B]

Who is Rezo actually? Scientist?

No, YouTuber/Twitcher and in this case editor. You will find him quickly on YouTube. (in the unlikely event that you question his competence: he uses sources if you don’t believe him. Unlike others.)

There is social behavior and the opposite of it. And whoever wants to live in a pleasant society should adhere to the consensus.

THAT was my original point of contention. Your expressed position with this: Consensus = heat pump (in this case here) no heat pump = opposite of social, ergo antisocial I am bothered by the manner of interaction as well as always the claim that one has the "one and only right" and universally valid way in one's own quiver.

Sometimes you have to be a bit provocative to get thought processes going. ;-)

I didn't want to offend anyone personally. If I did, I apologize.

And yes - the heat pump is the only right way to heat houses in the future (unless you build a passive house). There are only non-climate-neutral options left, or "worse" ones (direct electric heating).