I'm not such a big fan of the 4-color decks. While most of my poker is played online, my big money is saved for playing at
casinos. Because of this, I view the online games to be like a scrimmage game, my home games to be like regular season play, and the Casino games to be my Superbowl. If 4 colors make it easy in practice, I'm gonna miss them (or worse, think I've got them) when it really counts.
If casinos start using 4-color decks, so will I.
Play smart, practice like you play.