Not a parent commenter but I interpreted that as: given choice between alternatives A (fast and good enough) and B (more complex and much better) you would want to choose B but end up doing A for various reasons (lack of time, unclear ROI etc)

Sure, but the toolchain designers can (relatively easily) offer both, so that people who really do have the resources and/or need to do B can do so.

Are we still talking about a language that protects its users from the ability to write generics?

That’s a language feature; we’re talking about build flags. IMO, adding a build flag wouldn’t meaningfully change how simple the language is to learn and use, whereas there is at least a credible argument that generics would.