Is it just me, or does it feel like three out of the four things on this list...aren't actually characteristics
of 5e itself?
Network effects are important, but they're not actually
part of 5e, any more than your friend you can call on the telephone is "part of" the telephone itself. Yes, being
able to call your friends is important and can be part of the value you get out of
using the telephone, but the friend herself is not a
virtue of the telephone.
The history....has been there all along, for every D&D. That's not unique to 5e in any way. That's something great about every edition of D&D, period, whether you like them or not, whether you consider them successful or not. I mean, even 4e, the edition almost everyone likes to poop on for being anti-traditional, had Expedition to Barrier Peaks stuff and returned to classic settings like
Dark Sun that had been left behind in the previous edition (in terms of official support).
Every edition has leveraged the game's history as part of its appeal. Heck, you can even argue that
Pathfinder of all things leveraged this stuff, they just had to tiptoe around it because of licensing issues.
Flexibility, that I can grant you is actually a characteristic of 5e. I of course have my own feelings about the specific implementation, but this is at least something that is a virtue of 5e itself, and not a virtue of the situation
surrounding 5e, nor a virtue of simply
being an edition of D&D.
And...your fourth point....isn't even a point as far as I can tell? It's just "Conclusion: It's awesome." Which...I mean...it's absolutely great that you like this thing. But answering "what's great about X?" with "it's great!" is
at best circular reasoning, and at worst literally just repeating yourself without even trying to say more.
As one final note: While for you it may feel like there are too many critical threads on 5e....as someone who is not exactly a
fan per se, I can promise you, the number of threads containing nothing more than "gosh 5e is just, like, super great!!" VASTLY outnumbers the threads that criticize it, and bringing up criticism of any kind has a real strong tendency to get you shouted down by people who aren't interested in hearing anything even a little bit nonplussed. People have gushed about what makes 5e great. A lot. Repeatedly. For a while, it was rare for a month to go by without people posting yet another "ermahgerd it's so coooool" thread. You can imagine how tiring this gets for someone who has nothing productive to contribute to such a thread.
Now, if your goal was simply to say "these are advantages that apply to all D&Ds, 5e is just the current poster child," that's fair I suppose, but you'd still have some issues with points not lining up (2, in this case, since it is 5e-specific) or being...not really a point at all (4).
Edit: For comparison, I would argue
@Azuresun gave a list that was significantly more about the actual characteristics of 5e itself. (I'd argue that "hit points" isn't really a 5e-specific thing, since they really aren't any different from how they've worked in previous editions, but 3 out of 4 points being 5e-specific is a big step up.)