My husband replaced every single tool I was using this summer to build our newest coop with cordless versions because he got tired of unplugging stuff to plug in the next tool and tripping over wires.The supplier of our roofing specifically told us that using the angle grinder would void the 50-year warranty on the coating.
Your mileage may vary.
The shears are very easy to use and, IMO, were worth every penny.
Also the heavy-duty fence stapler.
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(My DH calls me "the tool enabler" because I always encourage him to buy tools that make our projects go more easily and smoothly).