BB - with the exception of the 28mm Zeiss, the lens that I have are from my film days - and I sold the best ones that I had a few years ago.
Also reading about the "problems" with the M8 - and the need for a filter on most lens I am unsure as to how they will perform - but it will be interesting to try as "messing around" as my wife puts it, interests me.
I still have two or three LTM, (screw thread), lens plus, I think, a couple of Nikon RF LTM lens, as well as a 50mm Elmar M mount - so they should be interesting as one of the Nikons is 13.5 cm - anyway you only need one lens with the Leica and I quite like the Biogon 28mm - although it's only f2.8
There are quite a lot of negatives with RF - but I quite like them and I still have my M6 and M3 from the past - (which never get used - but I just don't want to sell them)
I just saw the used M8 - it has been well looked after and is only 9 months old, (in Europe we can transfer the Passport between owners - so the cam still has over a years warranty with it) - my wife had just "visited" Hatton Gardens - so I did not feel guilt about the money side.
I could go on about Leicas - and I quite like reading about the quirks and "problems" of the M8 - which make life interesting and do and don't bother me - I would be bothered though if I "forked out" for a US$8,000 M9 and there were problems
anyway - winters here - I sure you'll hear about what i think about the M8 in due course - so far I have a list of things I need starting with a diopter - (correction lens) - as I wear glasses (I didn't when I used the M3) - but I can get by as with RF cams what you see between the lines in the VF only "approximates" to what the images turns out as, especially if do not use Leica lens - and these new digital 6 bit, or whatever, are a "bit dear" as we would say over here
Best wishes