Many of my courses had voluntary homework. Not surprisingly, the only people who passed the final were those that always did their homework.

Only a slight restructure will be needed to test student knowledge. This has been due for some time, with the level of cheating that takes place.

Related, I will be investing in test proctoring companies.

answers to the homework have been available for many years now

Homework: No Proven Benefits: https://www.edutopia.org/no-proven-benefits