Roughly. I would broaden the colloquial meaning to "new-wave tech companies". Ones from the past decade that aren't FAANG and maintain an agile culture (or at least purport to), and have a certain San Francisco sheen to them even if they aren't actually from there

I feel like you are now vigorously explaining that the other poster was right, that we should use some other name.

I'm not arguing one way or the other, I'm just observing that "startup" is an overloaded term in 2020, and maybe the new definition is a bit silly, but it's also really hard to get everyone in a society to change the vocabulary they've become accustomed to.

It's a bit like asking you to define just how many grains of rice there are in a heap. You may be unable to do so and yet know a heap when you see it.

Because investing in a .com would be bonkers.