Heating systems and plumbing systems installed in copper last longer.
This is the traditional way to install plumbing and heating in the UK.
I’ve been working in the plumbing and heating industry since 1982,
So I have seen some changes.
I understand new builds have to use plastic push fit due to the non-traditional design of new houses.
The reason why push fit is not as good as copper is that they usually incorporate an O-ring made from neoprene which may become brittle and start leaking over time. Whereas copper soldered joints are a welded joint, stronger than the copper itself, unlikely to leak in a lifetime.
I have been fitting copper for 37 years, if you use copper it should last a lifetime.