(Pro-tip: skip to the bolded part if this is tl;dr for you)
Stack Overflow was (and still is) the site I'm currently the most engaged and involved on in terms of reviewing, editing and flagging questions and answers, as well as posting my own answers. However, the first time a question I answered got migrated (to Pro Webmasters), I registered an account on there as well to not only follow the question, but to amend it should the OP follow suit (by registering an account), or have follow-up comments.
Regrettably, so many new users and even some semi-established ones, just don't bother registering on the site their question has been migrated to and I think this is a real shame. Particularly for Pro Webmasters, which I think has some really great potential for massive growth, is awesome in its own right and deserves way more traffic which could result from the questions and answers that it could get if more people registered due to their questions being migrated. As it stands now, a lot of the answers to migrated questions* just never get marked as the answer either, due to this issue.
Since the OP doesn't get notified about new answers on a migrated question until they've registered an account on the site their question was migrated to either, and the message they're greeted with upon migration itself is very perfunctory in just stating "your question has been migrated" with a link to where it was migrated to, I'd like to make a
feature-request that there's a little more prodding and cajoling for the OP to register an account on the site their question was migrated to. Ideas on how to do this if you agree with me, would be very welcome.
*Disclosure: I used one of my answers on a migrated question as an example.
**I failed at finding suitable synonyms for migrate in the intended context, so apologies for repeating the word ad nauseam above.