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MorphOS Exec core (taskswitching etc.) is "hosted" and not really native. When using MorphOS do you notice this?

If some more components where hosted what disadvantage would that cause? Apart from the "hosted == non native == almost like emulated == evil" feeling.

For example if filesystems/storage drivers where moved out of ABox into host OS, MorphOS could get mostly immune to many of the evil things that bad/unstable apps/libs may do inside ABox causing filesystem corruption.