I suspect the answer to these questions are the same. When different companies are developing the OS, the drivers and the hardware it is much harder to get everything to play together nicely.

harder perhaps, but not impossible, and the market has had decades to figure this out.

My guess is typical PC manufacturers have not felt it worth the time to invest in getting this aspect right.

Ironically, the best non windows trackpad I ever used was when Vizio tried to make computers. They actually got the trackpad right. In fact, those computers were really cut above everyone else, but my guess is they didn't sell well because they were taken off the market almost as fast as they were introduced

Yeah, because apple is totally reliable for sleeping when it is supposed to. I love my macbook, but I have dealt with over a decade of macbooks waking when they should not. Love it when my macbook cooks itself in my bag overnight.

I have never met someone with this problem, and have not experienced it myself in over 12 years. Closing the lid and walking away is what MacBooks are (were?) known for, I guess in my circles.

It’s a pretty common issue. Search around and you will find pages and pages of people experiencing the same issues on macrumors, the apple discussion forum, etc. Glad it hasn’t been a problem for you, I envy you!

I assume you’ve turned off “allow Bluetooth devices to wake this computer” and “wake on network access” in system preferences? Those are the only things I can think of that can randomly wake up macs

Oh yeah, I’ve turned every single possible thing off. It still randomly dark-wakes. And then, when it does, it will sometimes get into a doom loop of scanning the network and refusing to release its power assertions, meaning it won’t go back to sleep. Eventually it will hit a thermal emergency and then shut down.

I've never experienced this and I've been using macbooks since 2007.