I use my croc bags for both runnng errands and special occasions (sans kids) in good weather and door-to-door occasions (knowing I won't be exposed at outdoor / for long). Once I was waiting for taxi outside my building and a tiny tiny drop of rain fell on the back panel of my matte poussiere B - left a mark but thankfully at the border of scales!
Vintage shiny croc seem to be able to withstand raindrops, yet it's best to wipe them out immediately, or carry an extra bag for protection in ill weather/crowded or less safe places. These croc Bs are pretty and it'll be too sad just keeping them in the closet.
However I do have reservation in getting a croc Lindy since my 30cm clemence one always bang into walls or people
probably a smaller one in 26cm works better?