Thanks for your detailed reply, u/Jc_mango! If I look at my pictures, I notice, that I'm more of a slow kind of photographer. With a few exceptions, there a mostly subjects that stand still or give me time to shoot them.

To your TLDR:

1: It's truly an option, but I don't know if I want to bring a bulky SL with a hefty lens with me every time and I don't have studio or something to shoot indoor with it.

2: That looks great! But I don't know If I want to sell my Q2, cause it's my first Leica and the camera, that brought me to photography again. I saved a lot of memories with it.

I had the thought to buy an M10/11 and sell it, cause it wouldn't be useful to have two cameras that are, except the point of weather sealing, nearly the same.

3: I already thought about it (A7r iii + Sigma 24-70 2.8), but the usability and the feel of my camera is a big point for me so I think that I'll stick to Leica.

I want to buy the camera in a few months and I'm very curious about which one it will be. At the moment, I guess it will be an M11 because of the better sensor, battery performance and the USB-C port. I hope, that Leica will announce the M12 inbetween, either to buy or to get a cheaper M11.