I’ll vote for this, as it covers what I would also call the concept of “Eras”.
My “wish” is that MSFS would incorporate the concept of “Eras” into the 2024 sim. Probably too late at this point if not already coded, but it may be possible in a future update?
An “Era” is defined as a time period specified by a start date and an end date.
If MS/AS added an “eras” tag to the metadata of an object - be that scenery, aircraft, navaids, etc. etc. as described by the OP & others, and provided an option in the MSFS GUI for users to choose a time period to fly in (or tied it to the existing time/date options) then one could fly entirely in the present or any time period in the past [Edit, now that the Dune addon is released: or future!]. There would have to be a conflict resolution process put in place to decide which object was displayed in cases where the eras metadata overlapped, but I think that should not be too hard to resolve.
It would make what community & 3rd-party developers are doing so much easier.
Here are three other posts that discuss situations where "Era " functionality would help:
[WIP] Contiguous U.S. - Golden Age of Air Travel - 1958 navaids
Historical Airports and timeline
Historic Weather (as second timeline)
[Edit: And now a fouth:]