> Why the heck hasnt a single manufacturer included the USB Dongle radio IN the mobo?

USB radio dongles are not standardized, that's what Bluetooth is for. (There used to be a Wireless USB standard but it was never widely adopted, and it has fallen out of use altogether.)

There are USB-C power bricks that also work as hubs, so you're not wasting your only USB-C port.

Ive never purchased anything but Logitech, to ensure all of my mice work, so they are pretty standardized to me.. but again I may be a minority in this opinion...

Well yes, they may be "standardized" within one brand, but that isn't standardized. Why include a Logitech mouse/keyboard radio in a mobo when the one making the mobo isn't Logitech?

> BT mice have never been subjectively responsive enough for me.

Anecdotally, I've experienced very few issues with the Logitech MX Master (both the original and v3) on my Mac via BT - every once in awhile (often enough to be aware of it, but infrequently enough that it's not something I'd consider a problem) the original would cut out for a few seconds, but other than that it tracked perfectly, and I haven't even had the periodic cutting-out issue with the Master 3 (yet; I've only had it for a little over a month now).

Of course, this is dependent on the BT implementation of both the mouse and PC being used, which is something to take into consideration (I've had way fewer BT connection issues in general with MacBooks than with any Windows laptops).

My Logitech BT mouse works pretty well. I only notice one thing that's "special" about it and that is that it takes about 2 seconds to connect. As a result, when I first unlock my machine I'm spinning the mouse in a few circles until the cursor comes alive. Once it's alive, all is good. It's weird all these little things we learn to live with.

> BT mice have never been subjectively responsive enough for me.

I wanted to like Bluetooth mice, but they just didn't work out for me. Some of the wireless mice these days are dual mode though; can run with proprietary wireless or switch to BT to avoid the proprietary dongle (some of the proprierary dongles also can act as a standard BT dongle, if your computer doesn't already have one). I know there was a line of mice that did wifi instead of BT too, because that makes sense.