Handshock.... its like women.... it varies a lot
Now, not all longbows do have a handshock. It is also important to define what you consider a longbow...
A real longbow is not cut to center and has round limbs, like the ancient English longbows. For me that is. They have a handshock that will ratlle your tooth out of your cheek and you will feel the shock leaving trough your feet in the earth....
Nevertheless there are people who will be persistance in saying those bows have NO handshock at all.
Howard Hill bows... they are worshipped by tons of archers. I say they have a handshock.... but most of the Hill fans will say they don't have any, you are holding the bow in the wrong way...
Modern hybrids: no handshock at all and very fast... they really smoke an arrow and are dead in the hand. That's my cup of thea...
I never cared for handshock, because I shoot them all. Even horsebows, After a few shots I don't feel the handshock anymore.
You are right, it doesn't matter!