The question of manylinux1 wheels came up enough that I wrote a blog post about it. In short: for 1.21 I would like to ship only manylinux2014 and up. Here is the blog post https://labs.quansight.org/blog/2020/11/manylinux1-is-obsolete-manylinux2010-is-almost-eol-what-is-next/ Matti