We've just upgraded from 5.3.9.173 to 5.4.4.48, and it all went....
... ABSOLUTELY FINE.
No problems.
My previous experiences with doing much finer-grained updates to Lucee (eg: 5.3.9.133->5.3.9.160, 5.3.9.160->5.3.9.173) were full of grief and days and days of work to identify and fix/work-around unexpected behavioural changes in Lucee, so I was bricking myself when I undertook this update.
But it was fine.
Nice work team!
And the best thing is, there are zero critical vulns in 5.4.4.48, compared to previous versions we had been on:
{see image above]