It seems this topic is always discussed by adjusters from the catastrophe side more than adjusters from the regular daily claims side. The catstrophe adjusters seem to have the opine this question has not been answered before this particular hail/wind storm and it had been probably litigated in ever state in the USA.
My opine is most building materials can be replicated or found if enough time to find them is expended. Several roofing contractors in the US have mineral fibre shingles, slate, tile in the warehouse and can ship. Several companys make vinyl siding to match old vinyl. About 2-3 companys re skin alum clad Anderson or Pela windows. Many mills can cut any plank siding made in the last 150 years. The same for DH- SH wood sash windows. Seals for double pane patio doors. Custom trim, base etc.
Just turn these type losses back and let the supervisors close them and move on to the easy one's. Also sometime the photo's will loose you arguments for you. Differant mis match on old work. Exposed romex or EMT electrical on the exterior od a building. Non matching moulding, windows, doors, carpet, floors, plumbing exposed etc.