An informal experiment shows that jack-rack 1.4.7 and
ardour 2.8.11
both do exactly the right thing when a plugin referenced by a saved
session gains a port: they set the new port to its default value and
happily carry on working.
(Both also cope with the removal of a port. These are the only
publicly available hosts I have tested.)
What happens when you modify version-1 of your plugin and remove a port
(making Version2), then later re-add a new (unrelated) port with different
semantics? (Version 3)... Then load a project created with version 1.
Does the host in THIS situation set the new port to it's default value, I
doubt it. More likely it 'restores' it to some invalid setting.
Do you want a fragile, crash-prone, plugin ecosystem?, or a robust one?
I Agree with Paul on this one.
Best Regards,
Jeff