'Setq' and 'rplacd' also do not provide the power of Actors. See the following: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3418003 https://papers.ssr

'Setq' and 'rplacd' also do not provide the power of Actors. See the following: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3418003 https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3418003