The easiest choice is often to make none and stick to the course.
For Williams, that means backing their former Academy driver and giving him another year to learn and improve.
AlphaTauri's Team Principal, Franz Tost, is perhaps the authority figure on working with F1 rookies, and he believes a driver needs three seasons to be at their best.
If Vowles believes the same, then keeping with Sargeant amid the mounting pressure might be a masterstroke.
Despite his very public struggles to adapt to F1, Sargeant's junior years had him laps away from beating Oscar Piastri to the F3 crown, and he was just one point away from Liam Lawson in F2 last year despite the Kiwi boasting more experience.
Williams saw enough potential in Sargeant to bring him into the fold in 2021, so perhaps they still see growth in the Floridian.
On the other hand, former boss Jost Capito, not Vowles, brought Sargeant in, and plenty has changed at Grove since the German's departure.
A solid case of recency bias has fans cooing over Liam Lawson's results since coming into the sport.
That's not unfounded, with the New Zealander impressing everyone by stepping into Daniel Ricciardo's shoes and scoring points just three races into his F1 career.
The decision to opt for age and experience over youthful hungriness in AlphaTauri's 2024 driver partnership was curious after Lawson's bombastic arrival, but that might be to Williams' advantage.
Alex Albon is a driver transformed at the Oxfordshire team after escaping his Red Bull past, and Lawson might continue that trend.
Piastri is the living embodiment that a driver with ability can soar no matter their experience, and Lawson's four races reinforce that view.
At the risk of looking like a Red Bull refugee centre, Williams would do well with an Albon-Lawson partnership.
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