It is a different world today than in HCB's time in so many ways. For OP's purposes of traveling with wife to Europe I still think a small camera would be more appropriate. But if you are looking to get the highest quality pics then obviously it is not ideal.
When I took my family to Europe this past summer I took a Fuji X30. Quality was decent but certainly not the best by any means. But it made for easy hiking and a more enjoyable trip then the last time when I took multiple cameras and lenses.
Of course you could invest in one of the FF compacts from Sony or Leica.
x30 doesn't looks like "small digital point and shoot":
X30 is 118.7mm x 71.6mm x 60.3mm.
M2 is 138 mm x 77 mm x 33.5mm (+another 30mm for lens).
At one trip HCB was hunting at nights to have some money and at the end he was seriously ill, but camera made it back with him to Europe. Some of my relatives are living now near Brussel and travel across Europe with kids regularly. They aren't scared to take some pictures.
I think, it comes to two choices some of us have to make.
Choice one. Take convenient digital camera you are OK with and not afraid to lose. For some it is x30 and Leica digital compacts.
Choice two. Take camera you like to use and like outcome from this camera. For some it is film cameras.
Over years I went through all of these stages.
Took no camera. And now it sucks to have no pictures.
Took film PS (it was no digital). Great to have just few pictures from almost each of many trips.
Took film SLR. No difference from cheap PS.
Took mobile phone. Tons of crappy 2MP pictures, somewhere, can't find.
Took similar to x30 in size digital FujiFilm camera. So-so 5MP pictures.
Took 12-16 MP DSLR. Technically best pictures I ever took.
And now for couple of years I'm taking one Leica M film camera and mobile phone.
I admit, the film Leica M is the real problem! It is not going to take pictures in bang-bang-bang mode. It is not going to give picture which wife is going to like most of the time. But it is the only camera I like to take pictures with to have pictures I never have taken before. And location is irrelevant. Anywhere we go, family is waiting for me often, while I'm taking something like this:
https://www.flickr.com/photos/kf095/24397790799/in/dateposted/
https://www.flickr.com/photos/kf095/21153393009/in/dateposted/
https://www.flickr.com/photos/kf095/20741042632/in/dateposted/
Usual conflict of interests to me and maybe for OP as well. Take pictures I want or take pictures family needs. This is why it is important to have wife interested in taking pictures with digital camera she has approved.
🙂