What is the point of a double necked guitar?

But wait: there's MORE!From Wikipedia: In 2011, the National Guitar Museum unveiled the "Rock Ock", which it calls the world’s largest fully playable multi-necked stringed instrument. read more

You can have one neck in standard tuning and one neck in alternative tuning. You play rythm on the standard neck and then switch to the open tuned neck to crack a bottleneck/slide solo. Or you play the rhythm on the open tuned neck but switch to the standard neck for your solo because you never bothered to learn your scales in alternative tunings. read more

A double-necked bass guitar can be used for multiple tuning (e.g., B-E-A-D on one neck and E-A-D-G on the other, etc.); combining fretted and fretless necks; combining necks with different numbers of strings, etc. read more