As I realized that Leica M cameras more recent than my M10-series had become absolutely unappealing, plus, just too expensive, I pondered which SL-series camera I would try, as a way to continue using my Leica M lenses, if my eyesight were to decline enough to complicate rangefinder usage. Plus, I was starting to become more interested in using a camera more video-capable than my DSLRs. A pre-owned SL-2s was starting to look like the wisest choice.
What actually happened, in my personal case, was that I bought the Nikon ZR, sooner, rather than the SL, later, but, my wife and I have been using Nikon DSLRs and F-mount lenses for a number of years, and we had bought her a Z6 in 2018. Nikon Z made more sense, for our combined budget.
I still think that Leica SL makes sense. I simply had to contend with a pre-existing Z factor, and, Speedlights compatible with the Nikon system.