The Turbo connectors were perfect, but the Duo/PCE ones are kinda flimsy in comparison. The heavy Turbo-style grip bar on the Duo connections really weighs them down and keeps them wiggling and straining the port on the console. The Turbo connectors actually connect sturdy and the only time I experienced one separate from the cord, was when an ignorant overweight person walked across the four foot space between myself and the TV to walk into a wall and the force ripped the cable off the connector. But it's no different than when I stepped on the AC connector of my TurboDuo and damaged the console or dropped my Express with Turbo Vision connected onto a cement floor and it cracked the base of the antena. All cases were human error.
The Turbo and Duo Taps collecting dust inside were a bigger issue, but not hard to fix if you figured out the problem. But like some of the other peeves mentioned, it seemed to be an issue that took years to develop. I don't think that there's anything wrong with hardware having issues like the capacitors giving out after a decade or two.