It's a dead system.

Huh? Not because of Note 7 lah. They just abandon it straight out. I believe they planned to make a fresh start with NX1, with their aggressive marketing and trade-in, but didn't gain much traction. Camera business is not easy unless you build trust, loyalty and large followings cause it's not an item you can simply mass produce and sell like hotcakes like smartphones.

Though I too am sad they are gone. They are one of the pioneers of mirrorless tech before sony dominate the market.

I think samsung went out of the camera business (near end of 2015) way before the note 7 trouble began (released around Aug 2016).

There is a bunch of rumors circulating by the end of 2015 that samsung decided to invest or divert their research more into smartphone than continuing with the NX series.

It's not that "enough troubles with their phones even if they want to relaunch their camera" cause that issue never crop up until late 2016 when the first Note 7 exploded.