That would include caster/non-caster and dual-caster combos, of course.
If anything, Pathfinder discourages multiclassing. They focused on handing out goodies all the way to 20th level, for every class.
This is the thing I love most about Pathfinder. The straight fighter played by the non-optimizer in my playtest game is holding his own with a wizard/fighter/eldritch knight and a rogue/hexblade the two optimizers are playing.
I honestly thing we should go back to 1e/2e style multiclassing and make it cost a feat. Because the 3e experience chart progression doesn't level off you avoid the problem of multiclass characters catching up and only being a level behind. By the time the party is 20th level, your multiclassed character is 14/14 level which is a bit better than being 10/10. I thought about giving a 20% cost break for favored class which would make the multiclassed character 16/16 by the time everyone is 20th level.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.