I work in-house, and have been playing around with Obsidian in single-player mode for PKM purposes. I confess I have not done much with substantive law. My content so far is mostly notes about status of matters and internal/organizational stuff. (I’ll be buying a commercial license as soon as I can figure out how to jump through the requisite hoops!)
I’m also very interested in using Obsidian to collaborate and publish an internal knowledge base, but I don’t think private sites are yet supported by Obsidian Publish. Here’s my feature request to that end: Enterprisey private publishing.
A good Obsidian web clipper would be a pretty killer feature for lawyers (also everyone else), IMHO. We read and want to save a lot of stuff. Somewhat like @LisaC117, I have used Evernote for that in the past, but I abandoned it years ago.
I’m also using Obsidian outside work to organize my thoughts, collect parts information, etc. for my latest robotics project. 