Introducing an option to limit sync with /e/ servers on data connection (feature proposition)

If I am not mistaken /e/ (my device) is communicating on a regular basis with the servers to sync addresses, photos etc. That happens on Wifi as well as on data connection. That's great. But at the same time it is terrible for those who have only limited data access. When taking a bunch of pictures that are uploaded right away via data connection that can become quickly uite costly.

Therefore I'd suggest that for syncing with the /e/ servers there a choice being put up: (1) syncing only via Wifi, (2) syncing contacts and calendar via data/wifi right away, anything else only via wifi, (3) syncing everything right away data/wifi). Ideally, option (1) is default.

I am aware that specific folders can be excluded from syncing, but the feature as described above seems to me more intuitive and user friendly.