One of the most tedious aspects of Australian polling commentary from time to time is obsessive focus on Labor's primary vote. Somehow the Labor primary vote gets more attention than the Coalition's when the Coalition is more dependent on its primary vote than Labor is. In current aggregated polling, Labor has a primary vote in the high 30s (BludgerTrack has it at 37.7%) but there will always be people who say this isn't high enough and that the party needs very near 40% or it can't win a majority.
There may well be truth in this in terms of projecting from the present day to an election (because oppositions tend to fade and therefore have usually needed big leads at some stage of the term to win) but in that case the primary vote is not telling us anything we couldn't have determined from 2PP polling and its history alone. The idea that Labor needs a primary vote with a 4 in front of it to win a majority on election day, premised on it only once having won a majority with slightly less, is incorrect. The fact is we haven't seen a lot about what primary votes Labor wins a majority with these days, because it has only once done so since the rise of the Greens. This article shows that at recent elections, Labor has missed four in-theory chances to win a majority with a lower primary vote than its record low 1990 majority-winning score of 39.4%. While total minor party votes remain relatively high, it is very likely that if Labor ever wins federal elections again, it will someday break that record. The primary-vote-to-win history - based overwhelmingly on elections either run in different minor party environments, or else lost heavily - is meaningless. What matters is whether Labor can assemble a decent enough 2PP result and a good enough vote distribution to win a majority of seats.