Separating keikis

[Princerobby]

I noticed a keiki growing on one of my phals and I'm super excited about it.

I'm just curious though, do I have to separate the keiki from the mother plant? What would happen if I left it on? This question came to my head because in nature there's no one to come separate keikis from the mother plants so I was just wondering what happens to home grown orchids since most likely our plants aren't hanging on a tree.

FYI: The keiki is growing on a flower spike but my question applies to both aerial keikis and basal keikis.