> build pipelines, bundlers, CSS frameworks with their own toolchains, progressive web apps, Core Web Vitals, SEO, layout shifts, srcset/responsive images

Build pipelines are purely a technical decision. Bundlers are purely a technical decision (TBH, a non-brainer if you decide to have a build pipeline, but it's not an organizational helper). Those help one do some things, not several people to organize.

I'm still waiting for any person to claim they made CSS maintainable by adopting a framework. It's an almost purely organizational decision with no upsides at all.

PWAs are a product decision, not technical or organizational. The same applies to Core Web Vitals, SEO, layout shifts and srcset, those are all product decisions.

You can escape the technical and organizational decisions. You can't escape the product ones.