I counted all the above as tools in my original comment at least. And my criticism wasn't against some of those foundational tools. Like Borg is fine for what it's meant to do, but anyone deploying a frontend or backend isn't doing it directly on Borg.
Indeed, those doing frontend work would not interact with Borg or the SRE tools directly, but they would use Blaze, Critique and all the development toolchain, which is still much above anything available on the open market.