@mposolda I started #27247 to complete this issue.

Could you answer some questions for me? :)

Should Promote preview feature "update email" to be supported by default #27247 make "update email" feature enabled by default? FTR, enabling it by default makes the email field disappear from usual profile update forms. IMO, I think it should be enabled by default.
Should Promote preview feature "update email" to be supported by default #27247 enable the associated required action "UPDATE_EMAIL" on any pre-existing realm (in a migration phase)? FTR, with feature "update email" enabled and without this required action enabled, a user can't change its email himself. IMO, I think the required action should be enabled on pre-existing realms.
If Promote preview feature "update email" to be supported by default #27247 should enable the associated required action "UPDATE_EMAIL" on any pre-existing realm , should it do it regardless of "update email" feature activation? i.e. If an admin disables the feature before upgrading to release enabling the feature by default, should the required action be enabled nevertheless?

Promote preview feature "update email" to be supported by default #16739

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