When I bought a used Leica SL(601) recently instead of the newer SL2 , it was mostly because I didn't want to spend $6,000 on a camera that I wasn't sure I'd love. But it was also partly because I really don't need a 47-megapixel sensor. Who's got the time and space to manage 80MB per image photos?
I've had the SL for a month and that's long enough to know that I love it. It's big but not too big. It's an absolute tank, build-wise, and it's fast and fun to use. I'm happy. I can shoot my M-mount Leica lenses on it and am finding it even easier to focus them on the SL than I do on the M10-P. So everything's good then. I wish it had IBIS, though.
And then, just this morning, Leica announced the SL2-S. The SL2-S is, from my standpoint, an updated SL that adds everything in the SL2 except the giant sensor. The SL2-S has a 24 Megapixel sensor, which is a sweet spot for me. It also improves focusing, low-light capabilities, and of course includes IBIS. In other words, it's exactly what I wanted in the SL2. And to top it off, it's more than $1,000 cheaper than the SL2.
Apparently the SL2-S is being marketed as a hybrid still/video powerhouse. I guess the video features are great, but I don't care as much about that. I care about speed, handling, image quality, and reasonable file sizes. Proper video is a nice bonus, though.
I've already sold my beloved M10-P and preordered an SL2-S. I have no idea when it'll arrive, but I can hardly wait.