Re: Usual horseshit
If you could be bothered to watch the video you might understand what's meant. Whenever a manufacturer introduces a feature that is not provided by the OS, developers must follow the manufacturers API. Both Samsung and Huawei allow multiple app windows on their devices and for developers to take advantage of this in their own apps, they may have to work with different APIs. The speed with which the change has gone into Q suggests that this isn't rocket science and was also presumably done in conjunction with the manufacturers (means they have less of their own code to maintain, document and support).