Two things won the election:
* That WA swing. I thought the tide was going out for Labor there. I thought they'd do well, but merely solidly and win two seats. Instead, double digit swings everywhere, 4 Liberal seats lost to Labor, probably one seat lost to a Teal and one seat in doubt. And it looks like being a 3 Labor-2 Liberal-1 Green result in the Senate as things stand. It ended up being Labor's best state, which I'm not sure has ever happened before (the only time that it would've been even close was 1983).
Last time was indeed 1983; the only other time was 1943. Breaks Tasmania's ten-election streak of being Labor's best state (1993 through 2019). Considering Western Australia had recently been the Coalition's best state (for four consecutive elections, no less: 2007 through 2016) it's even more remarkable.
Other states fare as follows (regarding the question 'When was it Labor/the Coalition's best state?'):
New South Wales - Coalition never, Labor 1990
Queensland - Coalition 2022, Labor 1934
South Australia - Coalition 1998, Labor 1977
Tasmania - Coalition 1987, Labor 2019
Victoria - Coalition 1969, Labor 1987