Spilling Drops of Wine From One’s Cup During the Seder

Kvod Ha Rav,
I am aware of some, but very likely not all, of the reasons for the minhag of spilling drops of wine from one’s cup during the seder. This minhag seems a new convention and I would like to know your opinion on the matter if time permits.

Some attempt to provide some Qabalistic reason for it which I do not and do not care to recall.
I am not certain how new a convention it is. Hazal do not mention such a thing.
I am certain that it is not rooted in any true m’sora (tradition), that it is without basis or meaning, and therefore undeserving of our attention.
Have a meaningful Pesah
Rabbi David Bar-Hayim