In my own examples, I might change no. 2 to full-stop (am I the only person who's never going to call them periods?) and nos. 3 and 4 to dashes.
But I would fight almost to the death to keep no. 1 a semi-colon. Somehow, for me, it causes a kind of "tripping" between the first and second parts of the sentence, a kind of fortuitous stumbling or "falling forwards", if that makes any sense, and no other punctuation mark would have the exact same effect.
(I realise I have probably made myself seem to possess all the qualities of degenerate fin-de-siecle aesthete-ish limp-wristed transvestism attributed to semi-colons in FH's wiki quotes.)
But I would fight almost to the death to keep no. 1 a semi-colon. Somehow, for me, it causes a kind of "tripping" between the first and second parts of the sentence, a kind of fortuitous stumbling or "falling forwards", if that makes any sense, and no other punctuation mark would have the exact same effect.
(I realise I have probably made myself seem to possess all the qualities of degenerate fin-de-siecle aesthete-ish limp-wristed transvestism attributed to semi-colons in FH's wiki quotes.)