I always remember in Germany the PostBus. Large single deckers painted yellow. Now long gone. Like all public transport, sacrificed to the motor car, will climate change eventually cause the idea to return?
One way of interpreting some recent policy announcements is that the government is still trying to sacrifice public transport to the motor car and are now trying to use the threat of climate breakdown against public transport (by legislating that new motor cars must be electric from 2040, but leaving buses and Midland Main Line trains diesel-powered).