Bose? as in "Buy Other Sound Equipment?"
EOS R vs the Leica Q2. Talk about a contrast! Those cameras are as different as night and day. I wouldn't know where to begin to describe their differences.
Personally, I accumulate lenses and cameras that I enjoy shooting. It's a life long thing. And I indulge myself - with the support of my better half. Color me lucky.
The cameras I once used and worshipped during the film era, which were long ago sold, I've since re-acquired. Copies of my former Hassy, my old nikons, my Leica M-3, etc. - - all are now parked again on my shelves. And I push film through them all - just not as much or as often as I'd like. Life is short. Why not?
Have you ever held and handled a Leica lens? Words do not convey the sensation. Hint - do yourself a favor and go somewhere where you can do this, and do it. A small, solid, hefty chunk of beautifully machined brass? Adjusting the aperture ring or turning the focus ring - are experiences one does not encounter on a typical lens. Watching a person walk into your framing mask in the viewfinder is another experience not to be found on other cameras. The Q, by design, is a rather simplified experience. Compose, set your 3 variables and shoot. It's not about camera controls. I've heard some speak in terms of the zen of photography. But what do I know?
What I like most about the Q2 was that its announcement caused the price of the Q-P to drop ~ $2k - into a range I could then afford and did. Not needing a 47mp sensor, I am now the proud owner of a beautiful Q-P.
For most of the digital era, the Canon system has been my main gear. My shelves include the 1DX2, 1D4, 5D4, 5D, 7D2, SL2, SL1, SL1-IR, PS G12 & PS G2. And we won't go into lenses - except to say - there are too damn many. It's time to thin my Canon gear. The mass of a 1DX2 and 600/4 IS II with Gitzo 5 Series and Wimberley gimbal no longer looks like fun to haul and set up. My relatively svelte Sony RX10 Mk IV also gets to 600mm and its Zeiss lens isn't that bad - especially for a 1" sensor. And somedays I find myself thinking about the Oly 300 MFT combo. Hmmm.
Meanwhile, as Canon puttered around with underwhelming advancements, I had already moved into full frame Nikon gear - with the D850 and the Df, and - for about 3 years now - mirrorless APS-C with Fujifilm bodies - from X100S, X-E1, X-T1, & X-H1 (IBIS for manual focus Nikon mount lenses such as classic Zeiss lenses, Voigtlanders, and numerous Nikkor legacy lenses). And I almost forgot my token pair of 1" Sony's - the previously mentioned RX10 IV and its little brother, the RX100 VI.
I generally am not a Leica fanboy - nor is it my mission to defend their snobby customers (they have no lock on this) or even their price structure. What can I say - except there is just no other camera like them. Without apology, they set their prices at levels they determine will allow them to continue to produce the world's highest quality and make a profit. Based upon results, it works and the world continues to support them - at least enough of the world to keep them producing cameras.
Finally, if you buy and regret, I suspect the Q2 would be an easy - if not profitable - camera to sell. I hear they're hard to find.
Good luck and enjoy!
PS - when I find the time and energy to thin my Canon crop, I wouldn't be surprised to find an M6 &/or an M10-P and a lens or two added to the shelves. and a final note of caution: the Q is a gateway drug - it's a slippery slope!