Each person has their own reasons to use whatever systems they decided to use.
For those using Final cut, an M powered Mac is obvious. After reading tech forums for years, many people did switch to Windows / Premiere when Apple changed how Final Cut Pro works (from 9 to X), and its early days, Final Cut Pro X had a lot of features missing. Fast forward a bit, and there were switchers to Windows (add on the failure of Mac Pro trash can, etc). But now, M1 showed the performance prowess, and Final Cut has gained a ton of features it was lacking. In the world where time is money, any seconds wasted in rendering/encoding is money being lost. I can easily see people going back to Apple after seeing the M1 performs (and for a lot less power). Moreso with new younger editors who don’t have the time/money/knowledge to build a souped up high end PC workstation just for decent rendering performance. The M1 MacBook Pro can be the ideal mobile “workstation” for some of these people.
For more casual users (like me), the main draw of M powered Macs is the battery life. I’m going to use myself as an example, but no matter what intel laptops I have used, their battery life hovers only around 4 to 5 hours on typical use, regardless of the manufacturer claim. That’s not bad than the olden days, but still less than ideal, and is causing that power socket anxiety. Many dreamt of a laptop with iPad like battery like. The M Macs are delivering this. With so many work is now on the cloud and platform agnostic, whether the OS is Windows of MacOS is irrelevant. There’s a reason why even Chromebooks are getting traction in some niches. For these people, all that needs to happen is full universal binary on the software that they use. Once that happens, the only barrier is probably going to be availability and cost, not the machine itself.
For many, Windows still makes more sense. Gamers is the obvious one. It’s not about the performance, but more about platform support. Apple can make an Apple silicon super desktop with crazy GPU power, but it’s pointless if there are lack of games on the platform.
Enterprises probably still need Windows as well due to legacy/custom software. Some critical government apps are also Windows only. There’s no way around this since Windows has been the market leader for decades. Also there’s cost. Not many people/enterprises can afford a $1k laptop. Majority of laptops out there are ~$600 or less. The volume sellers are the low end Acers and Asus. Obviously Windows is the choice as Apple is not playing in that segment.
So imo each individual will have their specific needs. There are trends of what people decided to use, but I don’t think our personal reason disqualifies the opposite of our choice for other reasons.