I also noticed this awhile back and e-mailed Darryl thru The Darryl Williams website and here is his reply.
Alan,
The Daryl Williams Trio is still singing, although not as many dates as we
have done in the past. Karen and Shannon are not wanting to work a full
time traveling schedule at this time. Monument is only working about 100
dates a year. I can work their dates and still book the Trio out on
selected dates through the year.
Monument works primarily at Fairs and Festivals, and the DWT work primarily
in churches.