Absolutely spot-on from one of the savviest writers in the UK press. But any predictions of the SNP's demise may be a bit premature.
For one thing, they are not making many Unionists these days in Scotland's densest-populated areas. Secondly, many of us abandoned Labour for very good reasons - mine was Iraq - and I have absolutely no intention of rushing back to more of the same patronising entitlement which got them shafted up here in the first place. Thirdly, although the 'Red Tories' tag is a cliché, like all clichés it is founded in truth. Starmer's Labour is hemmed in by the innate Conservatism of much of the English electorate and his agenda reflects that, especially his craven shitebaggery on Brexit. I could go on.
Let's see how things move on now under Yousuf. There is unrestrained glee in Unionist circles; anyone thinking of endorsing it in the ballot box is IMO very misguided.