>>509726538
>don't even know what vocative case is
You don't even case "cases" in your language.

You used to at some point.
Thou\thine\thee...

We have that shit for EVERY word, basically.

You lost it at some point during empire-building.
The empire crumbled, the pidgin remained.

Anyway, Ukranian language also has "thou, but thou as in - I'm actively addressing thou" case.
It's a special case, because whereas other cases can be used to answer questions "who?\whom?\to whom?", this one literally cannot.

It's clearly a later addition onto a bastardised Russian language.

>>509726539
>literature ukrainian ironically preserves a lot of things from pre-revolution russian
Doesn't "preserve" them. They're added retroactively and poorly.

>>509726602
>Communists reformed the Russian language after the revolution.
They did. No argument there.

>>509726753
>we need old russian back
Not happening, sorry to say.
I don't remember a single case in history where language norms and rules were complicated further rather than simplified.