I think this could be a bigger thing actually. Very soon the it will be possible to create subdomains on L2s but there is still a problem. In order for subdomains to be secure it is necessary to make sure that the owner of the domain will not switch the L2 to something else. I have written about this problem before. One of the solutions is to create a DAO for second level domain holders. The members of the DAO would decide which L2 they wanted to be on, and would be able to change the L2 in the future, but there would be some safety, because there would be no individual owners of the names, and all the subdomain holders would be members of the DAO. I think there would be many people willing to donate some names for this DAO.
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