My bet is we'll see two things happen.
1) There is enough new candidate selection turnover in National to mean we're bound to get at least one more selection drama.
2) Robbo will suddenly pivot and start claiming that due to his personal economic stewardship, there is enough room for the very same kind of tax cut he's been smugly dismissing as 'inflationary' or 'for the rich' or however he's trying to frame the idea of indexing tax brackets against inflation at the moment and that him doing it is different to what National propose because reasons.