I didn't have any other way of requesting this based on your email asking for opinions, so I'll do it here. My reason for this is simple: Updating to 4.2 should be ~mostly~ backwards compatible with 4, but will future proof your class to the latest version. Future-proofing should be more important, since by the time this course is taken, most people will be using 4.2 to work on their next project. Thanks for your time and this course!

Thanks for the suggestion and taking the time to answer! I have gathered enough feedback by email and some from itch (including yours) and I'll post the decision soon.