Coming here after reading the second linked story in this article unexpected (and read this too) just before writing this thought, a new definition of startup is badly needed. The reason is that in the second story, half of the startups were mere ideas and were never executed/launched in the first place.

Furthermore, according to statistics, 1 out of 10 startups succeed on average or 90% startups fail within the first 10 years of launch.

So, we can say that startup is actually a winter game from the beginning.