I don't think it's a case of young v old either. Obviously older vets have more experience that they can draw on in identifying symptoms and coming to a diagnosis, and in treatment options that they've found worked before, but newer vets are more likely have done at least some rabbity training albeit minimal and may be more up to date on modern techniques, thinking and approaches which may not have been available in training years before. I do find some older vets a bit stuck in their ways and unless they're keeping an open mind and regular cpd, can risk missing the best option, and conversely younger ones lack the experience. Passion for the subject is really important I think, there's little point taking a bunny to a vet who doesn't really have an interest in rabbits and who maybe views them as children's pets with limited treatment options.