I am not big Go fan, yet its suited for embedded or drivers is a mindset question, as proven by USB hardware keys being shipped by F-Secure with Go firmware, goVisor, Android GPU debugger, ARM official support for TinyGo...
And since you speak of Java, companies like PTC, Aicas, microEJ, ExelsiorJET (now gone) have been happily doing business on embedded, with bare metal or RTOS based deployments.
And then there is Meadow/Netduino on .NET world, and Astrobe for Oberon as commercial products as well. Astrobe has been in business for 20 years now.
And since you speak of Java, companies like PTC, Aicas, microEJ, ExelsiorJET (now gone) have been happily doing business on embedded, with bare metal or RTOS based deployments.
And then there is Meadow/Netduino on .NET world, and Astrobe for Oberon as commercial products as well. Astrobe has been in business for 20 years now.