I know you're an Aussie, so your're just shitposting as per your national tradition, but this is some low-quality bait.
>All that cherrypicking
You're a mad cunt.
Thankfully, >>628585 got my back.
I see the point in your distinctions, but they are too autstic for my taste.
The difference between MP and SMG is purely arbritary, and I don't see the point in adding more confusion with the "subcarbine" category.
Guns should best be described by role first, like LMG, GPMG and HMG.
You metioned the Skorpion as an example for MP, yet it is not a pistol at all, and was never designed as one. Neither was it intended to be.
All this pointless semantics is leading nowhere.
The MP18 was the first SMG by all definitions but was literally named "Machine Pistol 18".
I would tend to agree with >>628682, if there weren't some particularly autism with the MP5, like factory-zeroed sights only and the mags not being designed to be dropped.
All in all, it seems as though there just is no real need for more advancement in SMG tech anymore. If anything, the whole class is being swallowed up by the burgers pushing for "muh pistol calibre carbines", because apparently everything needs to be an AR-platform.
Plus, the latest "advancements" in that field, the MP7 and the Vektor, were just hot garbage. The first one because the round couldn't kill a late-stage cancer patient, and the latter is just so bad, I am convinced they designed it as a troll.