33 years is not that young but not that old too. Most players at this age could play from 2 to 4 additional years without much problems for their performance. Kevin de Bruyne is a good asset for Manchester City, they will not let him go easily even though discussion between them didn't start yet. Kevin de Bruyne will not try his chance elsewhere because most experiences aren't positive at this age. He will try to stay at City even with a lower contract before seeking another club. MLS Inter Miami is interested on him by the way.
Pep Guardiola knows and understands what he needs this season, it's been a rough season for Manchester City but they can prevail above all obstacles and stil remain at their peak, not this season. Manchester City will always come out ontop each time they're playing elite club. We've come to witnessed the high level performance of the club, how they're able to win trophies and record streak winnings ratio. I wonder what will happen to the club when Kelvin De Bruyne decides to exits the club. We know alot will happen during his absence in the squad. We're acquainted with the performing levels exerted by the Belgium international. Kelvin De Bruyne is recognized in the club and respected by his teammates and his head coach.
From the look of things 33 years is not too old to remain in a club challenging for next season's title race. Pep Guardiola is not better compared to Ancelotti who knows perfectly why he still kept Modric, extending his contract on a one-year terms even if it is a condition of the club. Manchester City should not start next season without an experienced player in the midfield, departure of De Bruyne creates that vacancy. Pep Guardiola may not see this coming, it will affect his performance.
De Bruyne can perform perfectly if he remains sadly, it's obvious that he won't be staying any longer in the Premier League or any top League.