Thank you for this information. It is counter to several posts from @alzhao, @SimBot and @yuxin.zou, some as recent as this year that stated that the n300 and/or the USB150 would be getting 4.x
Your company is not following through on its commitments to its customers. I and others will take this into account when buying or recommending products from GL iNet.
Here are just some of the links to these commitments: