In regards to email notifications...
We are seeking members who have had these Preference settings since prior to the migration.
Watch content on creation:
Yes With Email Notification
Watch content on interaction:
Yes With Email Notification
If you have been subscribed to threads with email notifications since before the migration, and have NOT done the tip people are doing by unwatching and then watching threads again, and are still not getting email notifications, then please speak up so we can dig into your settings to see if we can discover the missing link.
My theory is that the subscriptions translated to watched threads perfectly, but somehow the part that connects to the email notifications got skipped, missed or corrupted during the import. The only way we can discover this, is by investigating an account that has not been tainted or reset by touching these settings yet.
Then there is the other level of the rabbit hole, in regards to whether or not you visited a subscribed thread, which appears to also connect with this in some way.