As an EECS student at UC Berkeley, whose intro CS class is in the same situation, I think it's mostly the latter. There are certainly more people seeking career

As an EECS student at UC Berkeley, whose intro CS class is in the same situation, I think it's mostly the latter. There are certainly more people seeking careers as devs nowadays, but that's nothing compared to all of the bio, math, physics, and psychology major friends I have taking CS classes. They want to see what it's all about.