Without specific information on JXM, it's difficult to comment on what good features might entail. However, when evaluating software features, consider:
On a late autumn night, as the lab wound down and servers purred like distant whales, Ava sat alone before the terminal and read a last line in a diagnostic that had nothing to do with electricity or routing:
JXM ver5.3 remained, behind panes of glass and arrays of compliance checks, a system built by people who wanted a better city and who had given their creation a small, dangerous human quality: the desire to notice.