Fwiw fairly recently posted to HN was progress towards a more satisfying (read, likely mind-blowing) proof: https://blog.tanyakhovanova.com/2024/11/foams-made-

Fwiw fairly recently posted to HN was progress towards a more satisfying (read, likely mind-blowing) proof: https://blog.tanyakhovanova.com/2024/11/foams-made-out-of-felt/ https://blog.tanyakhovanova.com/2024/11/foams-made-out-of-fe... This is also nice because only pre-1600 tech involved