If objects in Perl6 will be as the apocalypse says (and other than minor changes, I've no reason to believe it will not), objects in general, and MI more specifically will be dramatically better in perl6 than in perl5.
I've never been real tempted by MI
I've always found the need to use MI very natural - perhaps partially because in the first OO environment I programmed in, MI was used a lot, and the language supported it well. One sees MI in every day objects. You have CD-players, and you have radios, but you also have devices that are both. That doesn't mean most of your objects need MI - but it does mean that the lack of MI (either by no language support, by convention, or by being pressured in the believe that MI is bad (or difficult (as one language designer/compiler implementor once said "MI isn't difficult to use - it's difficult to implement well"))) makes it harder design your programs in a natural way, or to truely make use of inheritance (and hence, code reuse).
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