I've worked inside the Microsoft 365/SharePoint ecosystem for over 20 years, and the incoherence runs deeper than the GUI layer. Microsoft has been developer f

I've worked inside the Microsoft 365/SharePoint ecosystem for over 20 years, and the incoherence runs deeper than the GUI layer. Microsoft has been developer first, then cloud first, now AI first. It has never been design first. And when something does work, the pattern is always the same: force it everywhere. Metro was genuinely good on mobile, then they pushed it onto desktop where it didn't fit. Now Fluent UI is repeating the cycle. Fluent UI is on its third major rewrite (Fabric, then Fluent UI React v8, then v9). Each one brought breaking changes. v9 appeared around the same time Microsoft released their new Teams client, and it shipped with performance and accessibility issues that are still being worked through. Signs already point to the next throwaway Fluent UI version. In practice, Fluent seems to be first-party only. It's 'open source' in the sense that you can look but don't touch. In SharePoint alone, the same UI elements look different across pages, lists, document libraries, and settings panels. The irony is that the web platform itself has caught up. You can build a fully themed, accessible component library in plain HTML and CSS today. No framework dependency, no version lock-in. I did exactly that with hTWOo (https://htwoo.io/ https://htwoo.io/), an open-source alternative that matches the Fluent design language without any of the React coupling. The real problem isn't that Microsoft can't pick a GUI strategy. It's that they keep rebuilding from scratch instead of creating a design system flexible enough to sustain across platforms and product generations. The web platform already provides the primitives. You just have to commit to them.