Will fibre broadband be obsolete by 2030 - and what about 5G?

Labour has promised to give every home and business in the UK free full-fibre broadband by 2030 if it wins the general election.

The plan would see millions more properties given access to a full-fibre connection, though Prime Minister Boris Johnson said it was "a crackpot scheme".

If the plan went ahead and was completed on time, would it still be useful in 2030?

What is full-fibre broadband?
There are three main types of broadband connection that link the local telephone exchange to your home or office:

ADSL (asymmetric digital subscriber line) uses copper cables to a street-level cabinet or junction box and on to the house
FTTC (fibre to the cabinet) uses a faster fibre optic cable to the cabinet, but then copper cable from there to the house
FTTP (fibre to the premises) uses a fibre optic cable to connect to households without using any copper cable