Wait, grandfathered premium account won't get delayed send emails ?

I just got a mail from tuta talking about the new features, and I quote :

New features:

👉 Schedule Send to send emails later

👉 Undo Move

👉 Show received event invitation as ghost bubbles

Coming soon:

👉 Undo Send

👉 Inbox rules for labels

👉 Availability of guests in the calendar

👉 Tuta Drive

If you need additional features like Schedule Send or Undo Send, please upgrade now! 

Does it means that for feature as basic as Schedule send or undoing it, and included in almost every email provider, I need to upgrade to the revolutionary plan ?

I mean listen, I know and understand that we do not get the biggest feature upgrade, (I mean I don't understand it that much, but I get it, money is money) but this is some really basic feature, at this point it feels like I'm paying my premium for features that could just be free at this point.

Can you please clarify who will get access to these features ? Thanks