I know someone that grafts 12 strains per plant for mothers only. The thing you have to remember is different strains can have different nutrient needs. So you have to group them accordingly. It is a good way to have a variety without going over any limits
I had gotten it as a freebie a few years ago when I got some vanilla kush seeds. I wish I would have kept that instead of continuing to grow the vanilla. I agree with phizzion it is beautiful. Perfect for indoors