There was a time, believe it or not, when 30 was seen as some sort of watershed age for a footballer.
You were not so much into the final stretch of your career, you were into the final furlong. Some big clubs even had an unwritten policy of not giving contracts of more than a year's length to players who were in their fourth decade.
Those days are over. Mohamed Salah turned 30 earlier this summer and has been given a new three-year deal by Liverpool, Robert Lewandowski turns 34 next month but is signing a three-year deal with Barcelona.
So many of the world's most influential footballers are in their thirties. Christian Eriksen reached the landmark age back in February and has been given a three-year deal by Manchester United.
It is a fantastic signing. On a heart-warming level - please forgive the pun - it is wonderful to see Eriksen back with a truly elite club after what he went through in the summer of 2021.
On a purely footballing level, it is a great piece of business. Before the seven-month absence while his heart condition was treated, Eriksen was not only a brilliant technician, he was a durable professional.
After making his senior debut for Ajax in 2010, Eriksen was unavailable through injury for only 16 games before collapsing at Euro 2020. And he has made 542 club appearances and played 115 times for Denmark.
In those 542 club appearances, Eriksen has produced 162 assists and scored 115 goals. He is a high-class talent with high-class numbers and will bring a calm creativity to a United midfield so badly lacking in guile and intuition.
Eriksen would be able to stake a claim for a place in the midfield of any of the top European teams. Coincidentally, he has an Ajax connection, of course, which seems to be important if you want to become a new United recruit these days.
But there is nothing wrong with Erik ten Hag bringing in quality players he knows he can get the best out of, nothing wrong with bringing in players who know who the boss is. Cristiano Ronaldo knows who the boss is. Himself. And for what he has done in his wonderful career, for his professionalism, for his achievements, he probably deserves that privilege.
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And for most of last season, he regularly dismantled the case for United being better off without him. But while it really is only exhibition stuff on their current pre-season tour, it is encouraging to hear Marcus Rashford talk about a fresh start.
There are good vibes coming from Ten Hag's camp, Lisandro Martinez is an exciting acquisition and there will be more to come. Of course, optimism is natural when there is the sort of fresh start Rashford talks about and there is a huge gap for them to close at the top of the Premier League.
But if that fresh start has Eriksen at its hub and has no Ronaldo, it would be no bad thing.