The lure of the Guinness Premiership in England and French rugby has proved too strong for some, with the Scottish Rugby Union's well-publicised debate over the future of the professional game undoubtedly a big factor.
With the cash-strapped governing body admitting public money is needed to ensure the survival of all three professional teams, players face an uncertain future.
But Petrie, who studied French at St Andrews University before taking up full-time rugby, is not about to jump ship - having already had one spell with Colomiers.
He said: "I thought about playing in France again a few years ago - but I think I'll play out my career in Scotland.
"I've played in France before. It's a great place to play, with great people, but I'm happy here."