Adam, the 35FLE has been the lens I have used most between the 24-90. Excellent for low light.Bob, I seem to share the same thoughts. It really seems to me that Leica has almost shafted the S-system in favour of the SL. Because they believe it's the way forward. Be it issues with the S construction, cost of manufacturing vs market demand or whatever the reason.
It's not Leica's fault, to be fair it was just bad timing. The S-system came out when DSLRs were on their way out. And no I don't mean the DSLR is dead, I just mean that no new system would be designed with a mirror at this stage in the game. Even Sony dragged their feet with the TMT camera update (A99II). And probably really only did it because they had the resources and know-how. And really just didn't want to shaft their customers. I liked the A99 for what it was, I had ALL the Zeiss-Sony lenses. But ultimately the system lasted less then a year in my kit, the urge to switch to the A7 series was to strong. And Sony made it so easy with that adapter. To be fair the A7 series didn't last to long in my bag either.. But I'm not really a fan of Sonys colours, that's not a surprise coming from me.
Really what Leica will need to do moving forward is make a mirrorless MFD camera with an adapter for S lenses and an updated line of compact S lenses. But to be honest, I don't think they even have the resources to tackle that kind of a project right now. So the best we can hope for is adapting lenses to the SL. And good native SL lenses with an updated SL body down the road.
To me, none of this adapting makes a lot of sense due to my issues with the sensor. And the fact that I'd rather my AF to be fast if I'm carrying something so big. So I think it's just easier for me to move back to my comfort zone and shoot on an M240-P + a select few M lenses. Anyway rangefinders make me the happiest. So that's probably what I'll do for my travel/fun photography.
In the meantime I won't need to bother lusting over the newest and best from Leica since I'll have another system to handle my work needs. Probably the new GFX from Fuji by the looks of it. And the X-T2 for anything fast moving, since that little camera can hustle.
BTW, something positive about the SL (I'm trying something new here)... I think the 35FLE really works well on that camera. It's one of the better lenses you can adapt IMHO. Something about the colour of the lens that really seems to jive with the sensor. And I guess another positive. The 75APO is defective by design. So having an EVF will allow you to learn/manage the flaws of the lens. Essentially being able to see the scene unfold, allows you to avoid catching the 75APO on bad angles. And believe me for anyone who's not used the 75APO, it can be one of the most amazing rendering lenses, and one of the worst pieces of metal and glass to ever come from Germany. You really just need to know how to handle it. That and if I ever get asked to do more corporate video work. I can just use the SL, since it supposedly has awesome video capabilities (I wouldn't be able to confirm or deny, as I've not really bothered with it to much yet).
I dont really see the benefits of an EVF over the excellent OVF of the Leica S.
I also find the lens range of the S very complete - besides my wish for a TS lens in the wide angle range.
Lets see how compact the Fuji and Hassy lenses are compared to the S lenses.
I still find the S system very very good, if they fix the AF motor issue and improve service in USA (my experience in Germany with service is good).
The SL is a very good camera, flexible, fast etc. etc,
My heart is still more with the M and the S.
I even decided to get a M262 since I allways feel the M 240 feels a little like a brick.
The simplicity of the M is always a joy for me. I use auto iso, then just set f-stop, focus, click, thats it.