Yes I said almost all. And a single subclass of sorcerer doesn't make your point. Sorcerers, as a generalization, often do an armor dip. Bards, as a generalization, often do as well. I know you know this is not a knock on a full caster for doing an armor dip. There's no doubt you are very familiar with this concept, I've seen you mention it before, you never expressed it before as some knock on the class.
Also, it's not necessary. You can play a Wild Magic Sorcerer or Illusionist Wizard or Lore Bard without an armor dip just fine. The Wizard is good from the bank ranks using true strike with a ranged weapon, and ranged slot spells. They still get mage armor and shield, which is a good AC. The Illusionist can usually get cover/concealment as well. It's not a big deal to not get an armor dip, I just mentioned that I did.