That is true- but while they may be 3x as efficient as a gas combo boiler, but electricity is 4x as expensive so they are worse for your household finances.

Entirely dependent on where you live.

They are also vastly more expensive than a combiboiler to install- and they require much larger set of radiators volume or a switch to underfloor heating loops.

The fuck, no they don't. Heat pumps are tiny and can be installed in a day.

They are also more expensive to maintain and repair, and fewer conpetent engineers are available to do so. Horror stories abound of people spending tens of thousands to install these “green” heat pumps, only to experience poor performance, technical failure, abandonment by the installer and then huge bills to repair the system.

I have lived in several houses with heat pumps and have them at work where they run basically 24/7 because no one turns them off. I have never seen one fail. Not to say they don't, but the chances are not as high as you're making them out to be. I can call one of three different companies in my small town to come and service or fix mine if needed.

Frankly they are like almost all green tech- highly hyped, expensive, and underperforming.

Lie.