Not a huge fan of win+number. It’s an awkward hand position, it doesn’t help when I have > 10 windows (which might be a bit abnormal, admittedly), and it makes me think about which position the program I want is in (Yes, I know it’s simple and I can look at my task bar, but it’s still an amount of cognizant effort which is general something you want to avoid when designing a UI).
4 finder sliding would be the same effort if I had one desktop per app, which I wouldn’t. Chrome and coding would each have their own since they take a lot of screen real estate. Slack, telegram, terminal would all be on the same desktop. Anything else would be on a 4th.
Plus, generally most of my time is on the web browser so if I then had code to its right, chat to its left, and everything else 2 to the left, it would be an average of like 1.5 swipes to get to what I want and a real max of 3. With tabbing it would probably have the same average, but a real max of 10. The number version would have an average of 1 and a max of 1, but takes more thought and doesn’t work with large numbers of open programs. Lastly, I think the 4 finger swipe is the most natural hand position.