Developers at XDA have released an 'unofficial' Android firmware which Switch users can install on compatible models.
As the official blog notes, the unofficial ROM is a take on the Android 8.1-based LineageOS 15.1 and based on Nvidia Shield TV. Installation guide is published on the official XDA forum.
The software is not bug-proof and some of the known bugs include poor battery life, screen auto-rotation, buggy touch sensitivity, and more. However, it will provide you with a familiar interface while allowing you to play games and browse the web.
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