Dead creators can't create new works. The primary purpose of copyright, to my mind, is to incent the creation of new works for the ultimate benefit of humanity.

I'd like to see "life plus" sunset over a period of years, allowing those who "banked" on that business model to still benefit while decreasing the copyright term after death until it's eventually eliminated.

Removing copyright-after-death gradually discourages the business model you describe. It makes sense, to me, to ease into that gradually.

Does the end of copyright-after-death mean some works won't be created? Maybe. Some people might not create new works if their estate can't profit after their death.

Eliminating copyright-after-death opens the door for new derivative works sooner. I think there's potential for more new works to be created with copyright ending at death. More creators can build upon the old work versus a single creator toiling at the end of their life.

I am of the camp, ultimately, that wants to see the U.S. Constitution's original copyright terms restored (and the requirement for registration and renewal). I think it will need to be a gradual process if only to allow those who have (unfairly, in my mind) lobbied for effectively infinite copyright terms to die.