For those folks who’ve shot rangefinders for an extended length of time the issue is there is only one (currently) digital rangefinder camera.
The M is, like it or not, the only game in town. If you want to play then you have to pay – if not, there are plenty of capable “rangefinder-like” systems including the Sony A7/r – but the difference is in focusing – while you can focus quite easily using just the rangefinder on the Leica M, the focus peaking and manual focus tools on the Sony are, sadly, not the same and do require more time.
If you’re all about autofocus then there is a plethora of options open to you.
Cheers,
Dave

Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.