I too like his play, being an all-rounder is far better than being a specialist in one area,
like some players who kind of rely on a superior service game.
True, but how many, serve specialists, for example, are there on tour right now? Frankly, I can't think of any! There were Karlovic, Isner, Opelka but what about now? The same goes to serve & volley specialists (McEnroy, Pat Rafter) I suspect there are none. Modern tennis is getting more universal, you have to adapt to stay competitive.
Having a great service is key as it can give a great advantage over the opponent. But you are right, nowadays we don’t have real serve specialists like Isner or Roddick. But in the end, while their serve was their biggest weapon they struggled a bit in the other areas and never won any grand slams.
Previously, tennis players who had good service specialist qualities could take advantage of gaining points more quickly when the ball was in their hands and not only in tennis but also in volleyball or table tennis.
In these three types of sports, players who specialize in good serves will be able to achieve their own advantages, but as time goes by, tennis requires not only good serves but also skills in everything.
This will be much better because some tour competitions will bring together differences that will make things difficult for each other, each tennis player must really master various playing techniques well.
Just look at some of the young tennis players who have succeeded in becoming champions in various big competitions, they prioritize skills, strategy and also technique in breaking the opponent movement in chasing the ball that is hit.
Moreover, as time goes by, all tennis players have to be able to adapt and as @serveria.com said, tennis is becoming more universal.
This really influences the fact that every tennis match can be more interesting and seem very competitive.