If you work in B2B SaaS, sure, I guess. That's a lot of HN by virtue of being a lot of SF VC, but only a tiny part of all tech. Elsewhere shadcn isn't a realistic option.
..literally everything that isn't a recent, up and coming B2B SaaS. So >90% of the software written today.
To give but one example, effectively all of the >$300B mobile app market. Or all enterprise software that can't run on Electron. Or any company that cares about image/branding across their products, which is every single company past a certain size (and don't come at me with "but hot AI startup uses Shadcn and are valued at X trillion").
I will come at you at say that >90% of software written today is garbage, and >90% of companies are run by incompetent people. My hypothesis is that is the reason why we "need" Figma persons and project managers.