Replacing an oil boiler with an air-source heat pump: Why, what and how

We replaced our oil boiler with a Daikin Altherma 3 H HT air-source heat pump. It wasn't to save money, it wasn't to save time - so why did we do it, and was it a good idea? Sources cited in this video: https://www.boilerguide.co.uk/compare/types/boiler-vs-heat-pump https://www.greenmatch.co.uk/heat-pump/air-to-water-heat-pump https://heatable.co.uk/boiler-advice/energy-efficient-heating https://www.homebuilding.co.uk/advice/air-source-heat-pumps https://www.gov.uk/apply-boiler-upgrade-scheme/check-if-youre-eligible