not my fave animal so not too important to me but they're pretty cool

prime directive

Caution is advised. If they escape and multiply, the floor is larvae

It's not crucial, you can live without it -- most people do -- but I guess it could be an uplifting thing. But maybe cruel...can a caterpillar actually successfully morph into a butterfly within the confines of an abode?

the same importance as having a pet fish

wouldn't know. would be neat though.