The issue is that if someone found a major issue in Blink, would it even be feasible to get every Chrome, Brave, Edge and Vivaldi user to switch to Firefox while the issue is fixed?
The argument is still the same as with OpenSSH and OpenSSL. Having a single dominant code base is a security risk. The risk of OpenSSL has been realized and we now have good alternatives. OpenSSH have alternatives, but we're one major security issue away from having to shutdown remote management for potentially days. If anything we need even more browser engines, Blink is 90% or more of the market. Ideally no engine would be more than 20% of all users.
Personally I still think it's worth it to have multiple engines, both for security, but also to ensure that enough people maintain the skills to keep development active. Or if the US government forces Google to sell Chrome, then there's no guarantee that the buyer would spend the same resource on Blink as Google does. Now I'm all for slowing down browser development (allowing alternative engines to develop and give web technologies a chance to settle down a bit) but with the wrong buyer it not only slows down, it stops, IE6 style. Having WebKit, Gecko, and more, helps push things forward in that case.
The argument is still the same as with OpenSSH and OpenSSL. Having a single dominant code base is a security risk. The risk of OpenSSL has been realized and we now have good alternatives. OpenSSH have alternatives, but we're one major security issue away from having to shutdown remote management for potentially days. If anything we need even more browser engines, Blink is 90% or more of the market. Ideally no engine would be more than 20% of all users.
Personally I still think it's worth it to have multiple engines, both for security, but also to ensure that enough people maintain the skills to keep development active. Or if the US government forces Google to sell Chrome, then there's no guarantee that the buyer would spend the same resource on Blink as Google does. Now I'm all for slowing down browser development (allowing alternative engines to develop and give web technologies a chance to settle down a bit) but with the wrong buyer it not only slows down, it stops, IE6 style. Having WebKit, Gecko, and more, helps push things forward in that case.