Change chain = change everything ?

[DaveM]

If the current chain has been on there a long time, it is typical to change the rear gear cluster at the same time. Skipping under load is a sign you need to replace both anyway. It is a lot less common to need to change the front chainrings, but it is sometimes needed if they're very worn. "Everything else" could mean a lot of things. No reason you would change the derailleurs, cables, etc. unless they have some separate issue.