Knew a guy who started in I think '93 as an ArchE (160 hr program instead of the usual 120). Kept dropping classes and whatnot. Took a whole bunch of German classes and had enough for a minor, then a degree. Still didn't graduate. Wanted to work on the ArchE thing still. Last I knew, in 2007, he was still working his way toward a bachelors, but not sure if it was still in ArchE or not. By that time, he probably had to go back and retake College Algebra and the other beginning course he took at the beginning because the credits expired.
I took 4.5. Spent another 1.5 part time working toward a certification later. School was much, much easier the 2nd time around at age 30. Just more mature and less distracted by all the stuff that is college when you're 19/20/21.