If bridges are gonna remain a big point of failure, how will there be a multi-chain world in the future?

Smart contract bridges have been hacked countless times…Vitalik Buterin wrote a great post on the dangers posed by bridges whereas many of these threats aren't problems if everyone stayed on one chain

Is there a way to overcome the risks of bridges? Is anyone working on this? What solutions are being pursued? Or is a one chain world the only way things can be really secure enough for mass adoption?