https://www.bloomberg.com/news/articles/2017-04-06/no-more-sunoco-tacos-as-energy-companies-shed-gasoline-stations
7 Eleven has started converting the A-Plus stores to 7 Eleven
There is one in NJ that I could tell the A-Plus was 7-Eleven owned at first since it says Now Hiring with the 7-Eleven logo but then last year the A-Plus sign became "Mart", guessing 7-Eleven gave up on that.
Also there is many instance of A-Plus's that now have the new look when the Sunoco stations have updated to the new look they started using last year or so.