Whether this distinction is relevant to you depends on where you sit. If you are a startup selling developer tools, by all means think about the 99% developers, but also know that a lot of them are in environments that don't spend a lot on tools and are averse to exploring new technologies. If you are a developer in one of these environments, well, the standard advice on Hacker News is already "You're not Google."
I feel like some of this is a bit fatalistic. The 99% can follow a DevOps playbook if they realize its value, and it's cheaper to have DevOps than to not have DevOps, in the anything-more-than-short timeframe. The 99% can certainly have test coverage standards for new code. Somehow, we moved from a world where the 99% didn't use source control, and now they do! Some technologies and practices are so impactful, you should aspire to them no matter what you're environment is (e.g. code review, CI/CD).
The 99% concept also hides a lot of important details, as it's defined by exclusion. The choices you need to make for an early stage startup, a mature WordPress shop for small businesses, and a legacy mainframe team in a F50 are as different from each other as they are from FAANG.