That said, simplex chains strike me as "light". My Moto Guzzi motorcycle has the same duplex chain as one of the ranges of Mercedes V8's, but for the number of links. I think the Mazda chain is simplex 🙁.
If you get to the point where the chain needs replacing, be sure to change all sprockets and guides and rollers too... especially the sprockets. They wear too... and nothing will do-in a new chain faster than a worn, hooked sprocket.
never hed of issues with timing chain on skyactiv, guess mazda made it robust enough knowing the it needs to drive the high pressure injection pump. Unlike the DiSI 2.3 MPS which does have chain stretch issues.
otherwise good oil and keep to oil.change intervals