Might we name it the utility opening
1. Nf3 How limiting is it?

1. Nf3 is a way of being able to play into your favorite opening without immediately showing your cards.

I am still trying to figuree out a possible interpretation of "how limiting it is". I came up with nothing.

Okay, I give up trying to understand your reasoning.
It's an improvement on Ben Finegold's "Never play f6".

1. Nf3 is a great move. It is about as strong as 1. e4; that is to say it's as good a first move as any. I've played it OTB on many occasions.
It does tend to be more connected to d4/c4 openings than 1. e4 openings, because after 1...Nf6 or 1...d5 you can't really play an e4 opening, whereas you can play d4/c4 stuff or remain in Reti-type territory. So for a 1. e4 player it might be a bit of a new language.
Doesn't c5 e4 just transpose?
Also replying to OP, Nf3 isn't limiting at all, in fact it's in my opinion the best opening move simply because you are anyway going to play Nf3 in most openings, why not now? It doesn't show your cards. + for Reti Gambit (Nf3 d5 c4) where they go d4 and you go b4 and it's very interesting. Overall good opening (I think meant for hypermodernism as well)
Yes, you could play 2. e4 vs c5 or g6 or other first moves that don’t control the e4 square. I find these moves are a good bit rarer than 1…d5 and 1…Nf6, so if your goal is to play an e4 opening, you’re probably best off just playing 1. e4. But what you said is definitely possible
I’d say most masters who play 1. Nf3, unless they have a lot of past experience playing e4 openings, will meet 1…c5 with 2. g3 or 2. c4 (occasionally 2. b3 as well) since those moves are more consistent with the types of positions they’re getting from other lines within 1. Nf3, if that makes sense
It should be quite flexible actually, due to Q and B paths (not considering the knight blockade, but that doesn't quite matter)