I want apps to use the default widgets because I want theming and color selection in the OS to work again. That's about the extent I care about look and feel. Microsoft has ruined that on current Windows versions anyway-- making me resort to registry modifications to get the colors I want. Every time I see an application with a "dark mode", which should be an OS-wide theme function, I get a little sad at the wasted developer time.

Beyond the now-denied choice of UI color scheme I do not expect (or even desire) deriving any joy or pleasure from the look and feel of software I use. Most of my computing is for "work"-- be that my job, or paying bills, shopping, etc. I want the UI to get out of my way and, most of all, not to insult my 30+ years of muscle memory and visual intuition. I derive joy and pleasure from software that allows me to quickly accomplish my tasks with minimal thought or friction on my part.

I experience massive frustration with software using UI widgets that don't work like the native OS. Not having the standard keyboard shortcuts, for example, is a great way to make me hate your software. It's an immediate "tell" that I'm going to be disappointed if a program has bad tab order on its UI elements, for example.

Moreover, eschewing the time-tested and battle-hardened native UI widgets speaks to arrogance. It feels like an ego trip and it's almost certainly unearned. Random developers probably can't pull off a widget replacement that replicates all the nuance of the native. Good luck pulling off accessibility and internationalization, too. Even if they can how is reinventing that wheel a good use of their time?

My rage is amplified when I find bugs in software with non-native widgets. They had time to dick around with the widgets-- something already done for them in a vastly more competent and comprehensive manner for free-- but not to ship bug-free code for the software's actual purpose?

The same goes for animations, fades, gradients, etc. The vast majority of software I use is not special or dear to me. It's a tool. I don't want to, in a manner of speaking, look at pictures of the developers kids or vacations as a "toll" for using the software. Making software "pretty" is only self-serving and egotistical.