Max Verstappen suggested last week that if Red Bull had the Mercedes engine, its rivals "would never see us again", and maybe he's right. In the opinion of most, Adrian Newey remains unsurpassed, so yes, Max and Daniel Ricciardo might well be in the pound seats for 2018 - if they had Mercedes power.
They don't, though. When the team's relationship with Renault was at its lowest, a couple of years ago, attempts were indeed made to do a deal with Mercedes - and Ferrari - but, unlike Renault, these two companies are famously reluctant to sell engines to any team that might threaten them.
When Zak Brown was casting about for an engine to replace Honda at McLaren, unsurprisingly, given their mutual history, there was never a conversation with Ferrari, but there was much discussion with Mercedes, and Brown told me it got far down the line. What, then, ultimately killed it?