A romanticized hypothetical perhaps, but if Snake can play solid footsies against the likes of G&W and Ness like you suggest then that's in most ways kind of an ideal scenario considering I can't think of any other characters on the roster that invalidate Snake's reliance on grenade as a neutral option; Incineroar? Maybe Lucas has some advantages that Ness doesn't?
I'm actually kind of surprised that G&W can even consider to "work" in favor of Snake consider G&W outclasses Snake in pretty much every mobility category while having just as many meaty hitboxes or frame data to spare.
Joker and Min Min also handle grenade pretty well. Min Min punishes Snake for setting up with a 0 to death, and Joker gets Arsene, which can lead to 0 to deaths against Snake's unique disadvantage options as well. Min Min probably wins the MU while Joker is even, though, since Snake's edgeguards on Joker are pretty potent over the course of a set (might not get anything in an individual game though since you do have to read his option; Joker can be slippery).
I'm actually kind of surprised that G&W can even consider to "work" in favor of Snake consider G&W outclasses Snake in pretty much every mobility category while having just as many meaty hitboxes or frame data to spare.
Everyone, or nearly everyone, has more mobility than Snake without grenade. It's the amount of mobility you have that matters. G&W is faster than Snake, but it's not by enough to feel the difference.
For the thread and video, the meta development that made Snake so much better is that Snakes started getting better at camping. All the modern Snakes are grenade-heavy, but Hurt's grenade play is out of this world, very clean and airtight. The camping is so good that Snake started beating other zoners, and started having +2 MUs on all the swordies, which were previously considered even or losing MUs for him.
I always tell you guys, neutral is still the most important game state. All of the current characters soaring to the top are doing so off the back of significant neutral advancements.
Miya's advantage state is better than Maister's, but Miya's optimization of getting that advantage state via fully spaced n-airs is what really holds his gameplan together at top level.
Hurt's grenade play is by far the main thing that distinguishes him most from other Snakes.
Sonix? Do we even need to say anything there?
sparg0's Cloud evolved from sword spacing to realizing that you can just mash options like up-smash in neutral and not get punished in many scenarios.
Sometimes it doesn't feel like a neutral improvement because it's simple, just pressing a button faster in X or Y scenario, but neutral is the heart of the game still.
At this point everyone is 0 to deathing you at all levels. What really sets you apart is minimizing risk in neutral. Hurt's Snake does that, which makes it extra beautiful when he does take a risk, like vs. GnW and in game 5 set 1 against acola at Kagaribi.
It's why I still believe in Aegis. I can't remember who said this, but Aegis is just waiting for a CodySchwab figure, someone who can take the character and minimize risk with her.