Sidechains on BTC -- Drivechain and Blind Merged Mining - Paul Sztorc

Drivechain is a proposed soft fork of Bitcoin that allows BTC to travel to and from any other piece of software. How does it work? Does it have any detrimental effects? Do we *want* some sidechains to fail (and why)?

Source: https://www.meetup.com/Bitcoin-Meetup-Switzerland/events/259929435/