Google's iPhone-like gestures will become mandatory in Android Q
To satisfy more traditional users, support for the 3-button navigation bar will also be mandatory in Android Q. As for the company’s pill-based UI, that won’t be mandatory and will presumably be scrapped entirely at some point in the near future. Google hasn’t confirmed whether OEM-specific gesture navigation systems like the ones developed by Samsung or Huawei will be allowed in Android Q, but it was pretty open about its vision of unifying the Android ecosystem, something that, in turn, will probably discourage their use.
According to Google, defaulting to just two navigation systems will help make app developing easier. After all, developers currently have to take into account the different navigation options offered by smartphone brands and how they may affect interactions with their respective apps.