No console will sell more than PS2. The PS2 sold so well due to the large number of third party exclusive games it had. If you wanted to play a game, even a third party game, you had no other option but PS2. Now third party exclusivity is very rare, when it happens it is timed exclusivity (usually 1 year). Also it was the cheapest dvd player on the market. But now streaming is becoming more popular than buying movies in Blu-ray.
To say no console ever will is wrong. It is a really high bar to cross but not impossible. As it stands, the hypothetical switch 2 has the best chances to do so out of consoles coming in the near future.