See pics below. I have these and the panes have fallen out of some no others loose. Was planning on taking out glass, sanding, priming, re glazing then glossing. But st me it looks a lot of work.
Would you bother or get some used double glazed ones ( or new) and fit them?
I'd just pull out all the glass and wood separators, and replace with a single double glazed unit in each door. No way will you be able to refurbish all those little bits of wood to a reasonable standard, they are skanky!