Fernando Alonso's legacy in Formula One will be defined by questions about what might have been, according to former Force India driver Paul di Resta.
However, Di Resta hopes Alonso will not call time on his glittering career for some time yet, as the 42-year-old begins his second season with Aston Martin.
Alonso impressed en route to a fourth-placed finish in the drivers' championship last year, securing eight podium finishes in his first campaign with the team.
The two-time world champion's future has been a subject of speculation throughout the offseason, with the Spaniard touted as a candidate to replace Lewis Hamilton at Mercedes when he joins Ferrari in 2025.
Ahead of Saturday's season-opening Bahrain Grand Prix, Alonso said he is yet to decide whether he will race at all next year, and Di Resta would be disappointed if F1 lost one of its biggest characters.
Di Resta also believes Alonso will look back upon his short-lived move to McLaren in 2007 – and his subsequent switch back to Renault – with a few regrets.
"I've got a huge amount of respect for him. I wish he hadn't taken that [break] when he disappeared out of Formula One for a couple of years," Di Resta told Stats Perform.
"I think the biggest thing with Fernando is what could have been, with the championships he probably should have won and the ones he came close to.
"Some of the choices he made, moving to teams… I'm sure he's not scared to talk about that. I think he's just a born racer, absolutely committed to it.
"His spatial awareness, in race starts or on the first lap, wheel to wheel, there's probably not many people like it.
"I will miss watching him. I hope he's around for a long time and I think he's showing that age is not a thing, he can still grab great results.
"I think he's happier than he's ever been, less emotional, he sees the journey for what it is, he probably sees the end is closer in that sense and he's milking everything he can from it.
"I just love to see [Max] Verstappen, [Charles] Leclerc, Alonso, Hamilton in different teams going against each other, and I think people definitely respect what he's done, and he draws a lot of attention, and attention is a great thing for the sport."
While reigning world champion Verstappen is expected to dominate again in 2024, Alonso is among a group of drivers looking to take race wins off Red Bull.
McLaren's Lando Norris is another with lofty ambitions for the new season, and Di Resta thinks the 24-year-old has a big future ahead of him.
"I'd be surprised if he doesn't win a world championship, given his ability," he said. "I think the key for him will be reading where the best place to be for the future is, whether McLaren are back to being a consistent team to deliver a world championship.
"I think Lando definitely is up to that. Oscar [Piastri], he did a very good job for a rookie last year. He was a bit short of Lando in the races if you're being honest.
"In qualifying, he definitely had the measure and had the speed, so I'm expecting him to push Lando even more and I'm expecting him to be even closer to Lando.
"They've got great foundations and great team spirit to move forward. They will get into battles and you can see there's some frustration in their races with strategy and how it's going to play out, but Lando is very comfortable and I think he's probably in the top three picks within the grid."