I think the arguments here (and in the article) are largely missing the truly valuable point. For most businesses (not necessarily for Facebook, or even other

I think the arguments here (and in the article) are largely missing the truly valuable point. For most businesses (not necessarily for Facebook, or even other mass-market consumer-facing companies), the decision of native vs. web is not purely about responsiveness at the "10ms vs. 50ms" level of granularity. The conversation is centered instead around ROI (return on investment), and thus development/maintenance costs are very important. Thus, the steady march of progress in the PWA space is awesome, and will indeed lead to the decline of native mobile apps created in the corporate space -- especially for internal and B2B use cases (again, not necessarily for the Facebooks of the world).