@makers
If you become a naturalized citizen, applicants immigration category would change to F1. At that point, you would need to request to stay in the F2B category. If your children get married, the category would further change to F3. The wait time between F3 and F1 or F2B is almost 6 years.
Yes, we are all waiting, and the existence of the F2B/F1 category seems unjustified, especially when the wait time period stands at 9+ years now. Remaining unmarried is a significant factor that impacts applicants, especially if the applicant is female. I'm guessing that most female applicants from 2015-17 have already gotten married.
Immigration is a crucial topic in this year's US election, but there is a noticeable lack of focus on the legal immigration system.