The "follow post" feature is convenient for users having the same problem as asked about in the question.
Currently, the system generates the following comment for those who post non-answers asking about updates on the question (when these are flagged and get to Low Quality review queue):
- This is an “I’m having this problem, too” comment
“This does not really answer the question. If you have a different question, you can ask it by clicking Ask Question. You can also add a bounty to draw more attention to this question once you have enough reputation.”
(for the sake of completeness, comment wording slightly differs when user has enough reputation to add a bounty)
I propose to expand above comment with advice about the related follow feature, with text like below:
If you want to get updates on this question, use "follow post".