I was half-joking because the safety theme changes every year to match the accident records and often within about five years or so, the thing that was emphasized in precious years subtly changes the accident types to set the stage for later years. I'm guessing that around a 15 year circle... and the emphasis will come right back around to the original one you first saw.
The focus this year is on Loss of Control in flight. Why are people losing control of otherwise fine aircraft in cruise?
I say... Because they don't really know how to fly them. If you can't spin and recover a Skyhawk, you really don't know how to fully fly it. IMHO. How long ago did spin training get dropped?
It's just coming around the bend again as a supposedly "new" problem that people aren't spending time on stick and rudder skills. The autopilots are nice these days.
The multi-year "Stabilized Approach" emphasis hasn't lowered the number of stall/spin accidents per flight hour. And has cost us the ability to recognize a slip from a skid and made 152 pilots drag the final approach out at least a mile or more at some airports. They never need a good slip anymore, they're dragging the airplane back to the airport in full power cruise until the VASI switches from all red to having a white light.
Prior to that "Tune and Identify" was a common theme. Too many mis-tuned navaids. That one probably won't boomerang back around with the exact same wording in 15 years from its run in the safety emphasis darling message timeframe, since VORs and NDBs will almost be gone, but it'll be similar... "Over-reliance on GPS nav database data and/or GPS automation". Or similar.
The song keeps playing, the lyrics change. About 15 years ago weren't Bonanzas falling from the sky and everyone wondering how all these pilots were losing control of them in flight? (And the community learned that it wasn't the designs, it was mostly the pilots then, too?)
Right now we're buried in books and tools to teach "knobology". And just starting back into a "fly the darn plane" phase of these ebbs and flows in the safety reminders. Folks spent too much time flying the gadgets.