This relates indirectly to something I read in the article you posted. There is one small music store in the largest town near me, Griffin, Ga. The store sells digital pianos, but no acoustic pianos. They sell a ton of guitars, amps, drums, PA systems and other musical instruments though. And, their prices are competitive with the biggest and best music retailers in the business, including Guitar Center.
My son, who is a very good guitarist, was visiting the store recently. He told me one of the owners of the shop said the main-stream manufacturers, like Gibson, Fender, etc... were requiring them to order and stock larger and larger inventories of instruments in order to keep the dealership of the brand. Keep in mind, the size of this store is probably like 30' X 60' total. That is 1800 square feet, and not all of it showroom floor space. It's difficult to keep $250,000 worth of one brand of guitars, amps or other in that small of a space. They've been around a long time, and I've bought several nice musical instruments from them over the years. I hope they can stay in business and maintain the dealerships for the top brands of instruments.
I did not see where the article mentioned it's (Gibson's) subsidiary, Baldwin pianos.