Not the author, but I'm a VP of Eng, and one of my sub-orgs is QA. Here's my take...
Aside from writing end-to-end test automation, the best SDETs add value in many other ways. They triage bugs, use their deep product understanding (frequently the best on the team) to refine requirements and build test plans, coordinate bug-bashes and large scale releases, measure and report on quality metrics, and much more. All of this takes considerable load off other members of the team (SWEs, PMs, EMs, etc), allows the whole group to ship with much higher confidence, and increases the number of defects caught before making it to production.
If you have an organization where end-to-end tests are easy to write and very quick to execute, then I think the need for QA folks is greatly reduced. In my experience, once there's enough complexity and scale to a product, it's basically impossible to have a rapid TDD loop with enough end-to-end coverage that allows devs to ship features with perfect confidence. Combine that with all the other "hats" QA folks wear, and I think it's is a role that pays dividends in product quality and the efficiency of others across the org.
Aside from writing end-to-end test automation, the best SDETs add value in many other ways. They triage bugs, use their deep product understanding (frequently the best on the team) to refine requirements and build test plans, coordinate bug-bashes and large scale releases, measure and report on quality metrics, and much more. All of this takes considerable load off other members of the team (SWEs, PMs, EMs, etc), allows the whole group to ship with much higher confidence, and increases the number of defects caught before making it to production.
If you have an organization where end-to-end tests are easy to write and very quick to execute, then I think the need for QA folks is greatly reduced. In my experience, once there's enough complexity and scale to a product, it's basically impossible to have a rapid TDD loop with enough end-to-end coverage that allows devs to ship features with perfect confidence. Combine that with all the other "hats" QA folks wear, and I think it's is a role that pays dividends in product quality and the efficiency of others across the org.