I have a 10 years old Windsor that also still runs like a charm.
Mostly due to the fact that it demurely sits and collects dust in the lost part of the van.
Encap unlike HWE where any debris missed while vacuuming you can just pull the hose off the tool and use the cuff to suck up, you can't with encap. Two of us vacuumed for an hour each over 4000sq/ft on one job and then yesterday we only had 2000sq/ft and almost finished vacuuming when our vacuum broke. Had to hook up the TM just to vacuum up what the Cimex threw to the edges in the last office.