I think it is hard to beat the Spark in terms of Pre-flight prep time even with the new Minis. If I want to get in the air fast, I don't use an OTG cable and I hand launch with a double tap on the
battery. No other DJI drone except maybe the original Air has this capability. That being said, I do have MAS props that do not fold up that I often use in Spring, Summer and early fall but not in the winter as installing props in sub-zero temps tends to freeze my fingers. I also frequently use an OTG cable if I am not in a hurry or it is not freezing cold outside.
I too am tempted by all the new DJI tech and will likely be purchasing a new drone soon. Although it may take a slightly longer time to unfold a Mavic style drone, I don't think it will be a major impact on pre-flight setup.
For me, I am heavily into photography and the Air 2s or the Mavic 2 Pro have been on my radar for a long time BUT the rules here in Canada have really limited where I can fly these drones, so lately I have been looking at getting a Mini style drone like the SE.
Chris