On a fresh Proton Pass account, the “Include sender address in reverse-alias” option appears to be enabled by default — if I'm not mistaken — contrary to what's stated at the end of SimpleLogin's blog post from December 2020, which says anonymous reverse-aliases are the default unless manually enabled.
Has the default behavior changed again? If so, it would be great to update the blog post accordingly.
(Personally, I find including the sender's address in the reverse-alias extremely useful for filtering and organization, and I think the privacy concern seems somewhat overstated in this particular case.)