I know that Nextcloud has implemented end-to-end encryption at this point, but I’d just like to bump this topic specifically because it would be nice if Nextcloud specifically provided interoperability with Cryptomator.
As it is, it’s entirely possible to use Cryptomator with Nextcloud over WebDAV, and it’s possible to use Mountain Duck as a WebDAV client for Nextcloud, with or without Cryptomator vaults, but if one uses Cryptomator with Nextcloud, one generally loses the ability to make practical use of the official Nextcloud clients. Integrating Cryptomator into the Nextcloud clients would allow users to mix and match.
So for the purpose of interoperability I would suggest that Cryptomator integration no longer be marked as a deprecated feature request. Thanks!