Sadly the overwhelming majority of users depend on the cellular network by using data. The Dialer and Messages app are mandatory as they are system apps, and their removal would break things. Some people may have to call their carrier number to manage their data plans or othe Not using a SIM and using Airplane Mode together is the fix for now.

Using a Pixel Tablet avoids all this stress as it has no cellular data, so we recommend that for people desiring to avoid the network as a whole. If they make a new generation Pixel Tablet this year then there should likely be memory tagging support too and seven years of updates.