I know that historically pilots used to trim an aircraft to relieve continuous application of force during climb/cruise/descent, and at that trim tabs existed on control surfaces (elevator, ailerons, etc) which could be used to hold the position of the control surface without the pilot applying any force. But now, we don't usually have trim tabs, and with fly-by-wire systems forces have been reduced on the pilot.
Does trimming do anything other than reduce pilot workload? Also:
Do modern aircraft still follow this concept of trim to reduce pilot's continuous force on the flight controls?
Apart from pilot workload and fuel efficiency (I know that trimming an aircraft can produce drag), what other benefits does trim offer?
Without trim tabs, how is trimming accomplished?