switch between workspaces at will
This is something I still haven't got around to in Obsidian. The only use case I can think of that might help with my workflow is when I'm doing a weekly or monthly review. But it only takes me a couple of seconds to open the notes I need for that anyway.
I really need to delve back into some of the plugins and test out using them more frequently. The workspace one I tried briefly when it first came out, but it had a few problems for me which are now likely fixed.
This allows me to for instance in a client conversation have my task list for that project, notes from our previous conversation as well as in-depth notes about the work, all in one overview, next to the file in which I’m taking notes from the ongoing meeting itself. While in parallel to all that I still have the ability to pull all kinds of other information or conceptual description during the meeting. This allows me to quickly bring up things in high detail, and easily switch between high-level and low-level things, organisational aspects and the topic at hand etc.
This is how I use Obsidian as well, but I have a separate vault for this kind of "operational" note-taking, as opposed to "knowledge-building" note-taking.
I know that there's less of a hard boundary between these different contexts than the use of separate vaults suggests, but I've found that I rarely need to switch between them.