It’s because of chippers like that and the demand for chips, log grapples have gotten expensive around here
The need to design one that you put a whole tree in and it only eats the branches and drops out the log
I got to play with one a few years back in the U P. It was a rubber tire machine, but same set up. Friend of mine was getting his property logged, that thing was COOL!
after tornado went threw my property they brought one up OK on soft maple cherry birch... not so much big branches of sugar and ash