During the COVID-19 pandemic I collected my thoughts on my blog (https://mmcthrow-musings.blogspot.com/2020/04/a-proposal-for...) and on a site that I decided to dub MallowOS (https://mallowos.com/), paying homage to Apple's Pink/Taligent project and Google's Fuchsia project.
Unfortunately I haven't made any progress beyond design notes written in paper notebooks; I've got swamped with work (though now I have more free time since becoming a community college professor last year; I have summers off now!). I've also changed my design plans from basing off of Plan 9 to building a new exokernel in a language like Rust, adapting NetBSD's rump kernel for driver support, and using a single-address space design similar to Opal (https://dl.acm.org/doi/10.1145/195792.195795), though this isn't reflected in the MallowOS webpage yet.
Another thought has come to mind: not too long ago there was a discussion here about Etoile (http://etoileos.com/), a project from the late 2000s-early 2010s that attempted to build a GNUstep-based desktop environment. What made Etoile unique is its embrace of the Smalltalk inspirations of Objective-C. Imagine a new project that took Smalltalk inspiration one step further by adapting the ideas of this paper, fully integrating Smalltalk with the Unix framework.