Anything “live edge” is often done by hand. Also true for end grain cutting boards, end grain anything really, and any furniture made with mostly burl and heartwood. Coffee tables are common.

The reason is that knotted wood is dangerously unwieldy to machine without a lot of additional preparation. End grain work is just hard to automate. Lots of gluing into a shape that can’t be planed easily and prone to exploding if one is careless.

If you want to peek in to the weird long tail, the guys over at Sawmill Creek love to one-up each other in a never ending contest to be the king of traditional wood working.