Let me preface this by saying I'm a PC user, so I have zero experience with their Mac app.

So far I'm pretty happy with OSlash. I think the reduced functionality on PC is a bit of an inconvenience as I am currently relying on Typedesk for similar functionality.
What's great (really a double-edged sword...) about Typedesk is that from anywhere I can do /[command], wait a fraction of a second for my command to call a link and go.

However, with OSlash, I am reduced to using it purely in my browser. In some ways that's nice as I find Typedesk will sometimes interfere with my day-to-day, triggering commands when I do not want to. Overall OSlash is very snappy as it just points traffic to the link rather than call it and populate it in the URL bar, like Typedesk would. My issue or concern, and maybe this is less of one for Mac user (I have no idea), is that if I want to organize my shortcuts in collections, I am forced to use o/[collection name]/[command] which begins to get lengthy, the very thing I'm looking to avoid. It would be nicer if I could still group shortcuts for organizational purposes, but still call them with o/[command] instead.

I think for those who missed Typedesk, this isn't a direct counterpart, but it does at least improve your workflow in some areas.