By making “upstreaming” the core of OS contribution, we have also failed to build tooling around downstream synchronisation. There are dedicated browser forks (a very highly complex software) that are maintained by a few volunteers. So maintaining 1 or 2 additional features depending on personal choices (or a specific company’s) shouldn’t be that hard. If we have a world where that’s normal, we will have a bigger talent pool in core tech, cloud vendors would have a hard time selling hosted solutions of open source software..etc., I think we left a good chunk of net positive impact on the table by what Mitchell mentions as the “open source project as a product” approach.