>>In this case the same copy will be used but this means the requests have to be queued to be serviced by the same instance.
If we're talking about a series of hits arriving at an IIS server, what is the difference between free-threading and STA that causes you to predict queuing for one and not the other? Surely a thread is spawned in each instance: all in the same apartment for MTA, via a series of apartments for STA. The former is more efficient but not because of queuing if I understand correctly.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
