...a reason to make great use of the M platform is size-and-weight.
The EW-60F lens hood for the EF-M 18-150mm lens is, of course, plastic and oh-so-light.
But when properly attached to the 18-150 lens, the EW-60F lens hood adds a little over an inch to the length of the lens, and to the device.
I've been trying a lot of lens and body combinations recently, and for several days I was unable to locate the EW-60F lens hood.
Not to worry--dozens of shots sans hood, to my (corrected!) 20-15 vision, looked just fine...
Other than prevention of rarely-occurring lens flare and simple physical protection, does the presence of a lens hood on an EF-M 18-150mm lens accomplish much of anything?
Restating: the appeal of the M series, to me, is its compact profile. I found the hoodless 18-150mm lens, when mated to the M6, to fit a little better inside both of the bags that I use when out-and-about.