Der "strength/sturdiness" is not a big problem for most riders. They don't ride the miles, use their bikes in salty or muddy conditions with little or no servicing and some don't even shift too often
But some do impact their ders, back pedal when the der is off index and shift under power.
Better ders do help survive the first situations with less plastic, tighter manufacturer tolerances and tend to be better after servicing then the lowest cost grades. But better ders don't do much for the rider caused issues, except drive up the replacement cost.
Perhaps we might have a better ability to advise if we knew what short comings the OP's previous ders suffered with. (Said with the assumption that the OP is trying to avoid what they have experienced before). Andy