Even though you are heavily investing into your client apps for all services on multiple platforms, i think the core app for all platforms should be a bridge to transform the encrypted data to standard protocols, as you already did with the email-bridge.
The reason for this is, that most of us built their own ecosystem of apps and integrations for multiple years and the missing ability to use the known and trusted applications makes it a difficult decision to switch to proton in general. I would like to pay for proton unlimited, but as long as i cannot use the builtin gnome calendar with proton calendar or mount folders from proton drive, i cannot work with proton as with other vendors.
Plus: You could focus on the development of your ecosystem and your users could benefit from the multitude of awesome open source apps for managing calDav-calendars or syncing to webdav, etc..
Even though you are heavily investing into your client apps for all services on multiple platforms, i think the core app for all platforms should be a bridge to transform the encrypted data to standard protocols, as you already did with the email-bridge.
The reason for this is, that most of us built their own ecosystem of apps and integrations for multiple years and the missing ability to use the known and trusted applications makes it a difficult decision to switch to proton in general. I would like to pay for proton unlimited, but as long as i cannot use the builtin gnome calendar with proton calendar or mount folders from proton drive, i cannot work with proton as with other vendors.
Plus: You could focus on the development of your ecosystem and your users could benefit from the multitude of awesome open source apps for managing calDav-calendars or syncing to webdav, etc..