UX patterns that feel like an improvement to a developer on localhost with a dev data set, like a drawer instead of a new page, but in the real world that drawer and its data take longer to render than a new page.

And of course we let all the QA testers go because software is a cost center. This new feature idea is what's valuable, if only I didn't need all these people to actually build and -- oh, God, are you kidding me? -- maintain it...