Nowadays, even small yachts are becoming hybrid or pure electric. My friend's 37ft sailing monohull is pure electric, so is my 35ft sailing catamaran.
Range is not really a problem if you plan carefully and are patient. I try not to motor much anyway -- it being a sailboat and all. I do have a back up generator though.
If you do an image search for "marina" you can even spot them on most stock photos.
Many folks have a generator in case they need more range and there isn't enough wind. But I personally haven't needed it yet, but I also don't sail long distances. I would probably bring a generator if I did, in case there's no wind and I need to move.
My friend has a generator aboard but hasn't used it once yet, and he made it to Puerto Vallarta from SF.