Please have full versioned, fully functional (including anything you can do in the online version including settings, mailbox rules, etc: full parity) locally installable programs for all products or that includes multiple products (Mail app that has Drive, Meet and Calendar and a pass/auth/wallet maybe) that is completely usable when offline and will resume any queued emails in outbox or shared files or updated events, etc. once internet service resumes. Not everyone has persistent internet due to things like geographical location or security protocols. Additionally, should be able to configure Drive to be utilised in the programs of choice like one can use NextCloud as a storage/sync option in OnlyOffice for instance and file format portability so whatever is created by users in Proton's native apps can be opened or exported to similar programs of choice or saved to the folder or location of choice. Basically, the only reason someone would need to log into the Proton website is to do something account management related.