Thats exactly my thinking.Personally I wont spray.My long term pocket book can afford to do the engine once every 10 years or so.
Nitrous doesnt allow for that kind of longevity.It's very punishing to an engine.
And my chevie pal had a nice little 396 Nova on nos,until it went bang 3/4 of the way down the track.Flipped and rolled.Only thing that saved him was the roll cage.So no nos for me!