It is impressive to see a new architecture already have so much support for existing software with a relatively simple hardware support layer. It is already standing on the shoulders of giants with millions of man-hours invested in software development to bring it to its current state.
Related Question:
Why is Google developing a new operating system for their devices from scratch? Will this operating system be incompatible with all existing software? Or will it be compatible with software and hardware platforms like this one through some sort of compatibility layer?
Fuschia will be a capability-based operative system [1], a new security model for computing. I guess Google wants to experiment with a new software system for secure IoT devices.
[1] https://en.wikipedia.org/wiki/Capability-based_security