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![](https://lemmy.world/pictrs/image/8286e071-7449-4413-a084-1eb5242e2cf4.png)
I do see an advantage to tie it to a time period for the customer. If it was just tied to a major version then Unraid would have to make a decision about if a feature belongs in version 8 or version 9. Essentially locking that feature behind a paid upgrade. By making the upgrade tied to a time period they have no incentive to hold features back for the next major version.
This works great so far for the first few checkpoints on the delta emulator for iOS.