Evans has gradually emerged as one of United's defensive linchpins, stepping in for both Rio Ferdinand and Nemanja Vidic during the pair's many injury absences over the past four seasons.
The Northern Irishman's consistency has been rewarded with a four-year contract extension that will keep him at United until June 2016. And Ferguson expects him to be around for a lot longer. "Jonny has risen through the ranks to become an integral part of the first team squad," said the United boss.
"When he and Rio played together consistently last season our results improved. He has been with us since he was a kid of 12. He always had talent, although when he was younger I was never sure whether he was going to be a midfield player or a centre-back.
"But he has played over 140 games now, which is more or less saying he is established. And he is still young. As a 24-year-old a centre-back he should be playing for the next 10 years. Hopefully it will be for United."
Although nothing can be taken for granted with Ferguson, it is implausible a man who turns 71 on New Year's Eve will still be in charge for the next decade. Scholes, Giggs and Ferdinand will not be around either.
With Ferdinand still to decide whether he will remain at United for another season and sidestep lucrative offers from elsewhere, and both Scholes and Giggs appearing to become increasingly marginalised in another Premier League title challenge, perhaps it is no surprise the end of an era has been predicted for next summer.
In Scholes' case in particular, there appears no emotional attachment to a career that has seen him compared with the very best players of his generation. And, less than 12 months after reversing his initial retirement decision, another does seem entirely plausible. Ferguson, though insists no such decisions have been taken.
And for Giggs, whilst only making 12 appearances in all competitions this term, the Scot still believes his influence on the dressing room is a positive one.
"It is interesting because Scholesy says very little," said Ferguson. "I would be surprised if Paul had spoken to some pal without speaking to me - and he hasn't - so we can dismiss that. Ryan could play for another year or two and Rio's form this year has been terrific. It is the kind of speculation you expect and comes from our policy of only giving older players one year contracts but I wouldn't pay it too much credence."
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- Rio Ferdinand