Proton Mail contacts → Android system address book.
A GPL-3.0 Android app that signs in to a Proton Mail account, decrypts the user’s contacts client-side, and exposes them to ContactsContract so they appear in the system Contacts app (and any other app that reads contacts) the same way WhatsApp or Telegram surface their own contact directories.
I just think that if we blow out of proportion every mistake everyone makes we may as well start living in isolation in the woods. I think Proton did a lots of good and still does and they deserve benefit of the doubt. All the dramas are imo just a mistakes or misunderstandings echo-chambered by internet to death (and intentionally fed by competition as well). When you take a moment and look at the pure facts reasonably you will probably come to the same conclusion.