I wonder what the author would think of today's Lisps, or languages like Haskell and Prolog that embrace non-sequential execution, allow you to freely define infix operators, and have a where syntax.
That said, it does feel like the ML and Haskell communities really have taken up that spirit, with their emphases on multiple implementations and relatively ease of extension.
LOOP has nothing to do with non-sequential execution, or anonymous scoped blocks (read: 'where' clauses).
"Always bisexual, he threw himself into the politics of the Gay Liberation Front in the early 1970s. He separated amicably from his wife in 1973, and was closely in touch with her and his children till his death. For the rest of his life he pursued gay politics, and his house in Rona Road, Camden, became a gay commune. Always more of a facilitator than an activist, he saw many plots hatched at his dinner parties. Aids: the Musical! was conceived there, as was the reinvigoration of Gay Pride marches in the mid-80s, just in time for the battle over Clause 28. Towards the end of his life, Peter became convinced that computing had been a bad idea, giving support to profit-taking corporate interests and a surveillance state, and that he had wasted his energies in promoting it. But whether he liked it or not, his ideas underpin developments to this day."