That makes the assumption that failure of the company is something that the notability of "something interesting" would be judged on... Which in my experience

That makes the assumption that failure of the company is something that the notability of "something interesting" would be judged on... Which in my experience is not the case: if it was interesting or unique people will write about it - and then it is notable. (wikipedia is not really for recording primary information; that makes it a little useless)