Cont’d.
Samsung, compared to Japanese companies, is a different bag of cats. Samsung is known to mercilessly kill off the units which are not profitable. If NX would fail to gain desired market share, Sammy would kill it. (There were dates named, but I can’t recall them.)
All in all, the only large companies which are somewhat stable right now (and have stake in the camera market) are Canon, Ricoh and Panasonic.
(But Canon is expected to have troubles ahead: the printing market, the cashcow, is steadily shrinking. Printing is another victim of the mobile (internet) revolution.)
Smaller companies like Oly and Fuji are somewhat different, since camera business, on one side, is small compared to the rest of the company, but on the other side is irreplaceable part of the public image of the company. Thus the camera business plays more of a PR role, helping sales of other business units indirectly.

Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.