Most hurricanes only achieve category 5 status for hours... Irma is the longest at a little over 3 days. It just takes a perfect environment to achieve and maintain that intensity.
The new technology will definitely help. My irons are 10 yrs old. I spin my 7-iron at like 4500 rpm. Wicked high. I hit a newer iron in the simulator and it instantly dropped it to 2500 rpm.
If you are focused on the results... then yes.... since Bob we've had nothing (except the un-named Cat 1 Scott mentions). But if you focus on the opportunities, as WxWatcher points out... we've had a fairly conducive pattern for a decade.
I think Tip made this point previously... but we have been busy. We just haven't had a landfalling hurricane. Henri, Elsa, Isaias, Fay, Irene and to a lesser extent Sandy.