e-bikes are getting pretty popular. Solves the hill problem.
Also e-bikes are expensive and heavy, of course, so they're a good gentrification measure, if you're into that sort of thing, but they aren't for everyone.
But it's a solvable problem. Newer apartment buildings in London must provide secure cycle parking for residents and visitors.
For older buildings that lack such provisions, London councils often provide secure (covered, lockable) on-street cycle storage facilities. 1 or 2 car parking spaces can be converted into parking for many bikes! [1]