Here is my pluot(not a registered cultivar).
As you see its grafted on a plum rootstock and the hibrid grows much bigger.
They are also prone to diseases and the trees dont look healthy but its only the looks and the trees survive well and live long thogh with woodpecker holes in them .
This tree is soo valuable for me that i dont dare to prune it otther than collecting a few scions to graft on otther trees.
All the fruit this tree produces gets eaten every year and nothing goes to waste.
In contrast i dont like any of my otther plum tree fruits and i use them only to make distilled alcohol from them.