We've been downwards-compatible for many years now, I don't think we should break that now.
As for renumbering changes: we can do that downwards-compatibly by adding a 1-liner redirection file.
As for origin changes: we can do that downwards-compatibly by adding a 1-liner redirection file.
I would prefer that over introducing a new meta command.
But I think we should not devote our energy to such currently, as wrong origins or orientations can easily
be corrected by the users, and new parts will not suffer from that.
Instead we should focus on bringing the parts off the parts tracker
which wait there for years already.
As for renumbering changes: we can do that downwards-compatibly by adding a 1-liner redirection file.
As for origin changes: we can do that downwards-compatibly by adding a 1-liner redirection file.
I would prefer that over introducing a new meta command.
But I think we should not devote our energy to such currently, as wrong origins or orientations can easily
be corrected by the users, and new parts will not suffer from that.
Instead we should focus on bringing the parts off the parts tracker
which wait there for years already.