Since Trump's acquittal is assured, I'm curious what would happen in the opposite scenario? Is a prez immediately out of office and stripped of all powers once 67+ senators vote to convict? The moment the Chief Justice puts down the gavel? Not really comparable, but after the 2003 CA recall, it took a month until Arnold Schwarzenegger actually took over as gov. I assume in case of impeachment, the VP is sworn into office in a matter of hours?
Well, a recall election is not the same thing as being literally found guilty of "high crimes and misdemeanors". I don't know if there's an actual legal procedure laid out, but if not, I'd imagine there would be a rush to move on with the succession. After all who would want a President removed by a trail to hang over for some more time?
I suspect the government machine would simply treat it the same way as learning that the incumbent has died, making the VP or the next person in the line of succession automatically assuming the office, as the oath is not really required to enter the office itself.