Abreast of is a common phrase that implies being up-to-date with recent developments. However, if you are tired of using the same expression repeatedly, here are some synonyms that can give an alternative.
1. Apprised of - informs someone about something.
2. Knowledgeable about - understands or knows about a given subject.
3. Up-to-date on - being current with information.
4. Enlightened about - learned or informed about something.
5. Familiar with- recognizing, identifying, conscious of something.
6. Informed of -having knowledge or information about a specific matter.
7. Alert to - being aware or watchful of something.
8. Well-versed - being knowledgeable and informed about a particular subject.
9. Conversant in - having a working familiarity with something.
10. Cognizant of - being conscious or knowledgeable of something.