I could swear PS3 had passed 90 million, considering for how long it was on the market. Guess I remembered wrong.
PS2 is basically untouchable because the market has changed considerably. If I'm not mistaken, PS2 could still sell in countries where console prices have been prohibitive since the HD era began, and the Slim revision dropped in price to the point it was literally an impulse buy. Impossible to do those numbers without those two conditions, unless a place like China starts buying Switch in droves.
Still, expecting anything to reach PS2 numbers is unrealistic. 100-120 million in this day and age is a reasonable goal, and Switch is going to reach it pretty comfortably at this point unless something unthinkable happens.