I've found several official sailboat company references to their boats as yachts.
It seems to me, it's a boat until you are trying to sell it.
HINCKLEY YACHTS ©
Off the Marlow Hunter Web site: "The Hunter 36 is a stunning cruiser. The updated window line gives this yacht a sleek feel"
https://www.marlow-hunter.com/mid-size-keelboats-31-37-fleet/the-36-one-boat-two-personalities/
"Money can't buy you happiness, but it can buy you a yacht big enough to pull up right alongside it." David Lee Roth
A very nervous first time crew member says to the skipper, "Do yachts like this sink very often?"
"Not too often," replied the skipper. "Usually it's only the once."
-Will (Dragonfly)
It seems to me, it's a boat until you are trying to sell it.
HINCKLEY YACHTS ©
Off the Marlow Hunter Web site: "The Hunter 36 is a stunning cruiser. The updated window line gives this yacht a sleek feel"
https://www.marlow-hunter.com/mid-size-keelboats-31-37-fleet/the-36-one-boat-two-personalities/

"Money can't buy you happiness, but it can buy you a yacht big enough to pull up right alongside it." David Lee Roth
A very nervous first time crew member says to the skipper, "Do yachts like this sink very often?"
"Not too often," replied the skipper. "Usually it's only the once."
-Will (Dragonfly)