It is indeed still in use at Morgan Stanley in the Interest Rate Derivatives Technology group. Apparently there were plans to decommission the A+ code as far back as the early 2000s, but much of it is still in use and, from what I can tell, the users still have a fondness for it even in the face of replacement pieces done in Java/Scala/C#. Several A+ devs retired within the past few years, but they have been able to bring on new blood, which was surprising to me. I didn't do much A+ coding in that group, but it always seemed like a breath of fresh air working in A+/XEmacs where you could easily directly inspect the running program to either produce new results or investigate existing ones. It was certainly much nicer than working on the modern Scala project that would often take an hour+ just to rebuild if you happened to add some logging.