A vegan would not wear leather shoes. If we're going to go off anecdotes, most vegetarians I know wouldn't either.
However many people I know transitioning to vegan/vegetarian lifestyles will continue to use leather products from before the switch, at least until they wear out, to avoid being wasteful.
Exactly, I'm vegan but I have a leather jacket I bought before transitioning. I will use it until it wears out. Some vegans would sell/throw out all their non-vegans clothes afraid of what others might think, but a lot of vegans do not care much.
However many people I know transitioning to vegan/vegetarian lifestyles will continue to use leather products from before the switch, at least until they wear out, to avoid being wasteful.