The Economist editorial says if Biden was a UK party leader he would have been replaced long ago by now and offers a list of 10 Democrat potential replacements.

The Economist leaves out the point that party leaders in UK are selected by MPs first and not by popular vote. A USA President position is very different. A fairly large down-payment on a war chest is required just to win the internal rank and file member vote across the USA. That process itself is seen as partly a demonstration of fundraising ability for the national presidential election campaign to come where an even higher spend is required to match or exceed the opponent from the other party. UK Prime Ministers are accountable to parliament and can be removed far easier than a USA President where it almost never happens. USA Presidents are almost as secure as a king.

I'd be interested to see the list of ten if anyone has it to hand. I probably have access on a different device.