Just to be clear on what everybody’s talking about here – especially so for the newer riders...
There’s two distinctly different types of “Engine Braking” and some of the folks in this thread appear to be talking about 1) Normal, gradual deceleration by simply backing off the throttle – While others are referring to 2) Throwing hard & possibly multiple downshifts for rapid deceleration.
Personally I do “1” all the time (for reasons too obvious to explain) and I also do “2” a lot; mostly because it’s fun, i.e., I enjoy working
the gearbox, timing the shifts (getting the RPMs where they’ll want to be when I come off the clutch) and finessing that clutch release. It’s also a skill worth honing for those times when it may be necessary to drop a gear in the middle of a corner... without dropping the bike too
That said, while it used to be necessary to use the engine to slow the bike because some of those old drum brakes needed all the help they could get (especially with repeated, back to back, heat fading stops) with modern disc brakes, if you’ve really
got to stop the bike in a – deer in the middle of the road
– hurry, I’d say forget about engine braking and just use the brakes!