As a fellow instructor said, "Who will fail the students now?" Probably nobody. Pass 'em on; keep 'em enrolled. Keep the headcount high. That's the goal of most schools, but it was never mine.
I wanted students to learn. I gave them detailed evaluations of their programs and told them explicitly what to do to make their programs better.
In most classes a few students did quite well. Most did not. Most obviously never even opened the textbook and then complained when they couldn't do the work and received a failing grade. Sigh.
They are not my problem any more!
I'm still writing code. Most recently I wrote in Python a boardgame simulator for TMD: Total Musical Domination. That was fun. Then I wrote a card game simulator for FAB: Form a Band. I'll always be a computer scientist even if I'm not being paid to be one any more.