The profile core module is being deprecated in D7. It exists and operates in D7, but is hidden and can only be enabled with drush or a custom module. Drupal.org recommends that users now use Profile2, a custom module, but my attempts to do so have met with WSOD on several attempts. In fact, after enabling the module, it will crash the site if you try to disable it. The problem links to a core issue, but even with the recommended patch, Profile2 still has other problems I have not been able to correct yet.
In the meantime, I enabled Profile, and it has desirable features I would like to implement. My concern is that whatever I do may be lost in the future. Since I cannot load Profile2, I do not know if it builds on Profile or I will have to reconstruct everything later.