Feature: Card-on-file / Charge saved cards / Update expired card

I would like to give access to our donors to the contact dashboard and also let them donate from that page to different campaign or events signup, so they would not have to enter their details over and over again.

I was also thinking, what if it would be possible to give option to store their credit card details like modern checkout does, for them to avoid entering them every time?

Since a MIH is going on currently, what are possibilities of achieving this with stripe and include in the MIH? Thanks