So far I only use MoC for listing what comes in through Omnivore. Omnivore is a read it later app that has amazing integration with Obsidian. You can bring over whole articles or what you highlighted in Omnivore (that’s what I do) tagged and all. I have it set up so it drops all incoming into an omnivore folder in my vault and then I have MoCs (dataview) that list the articles/highlights per topic. For example in my leather craft folder I have a MoC that lists all links to articles saved and tagged with “leathercraft”. So I don’t have to search through my omnivore folder (which is structured by date saved).
Otherwise I think I don’t have enough content for a single topic to have a MoC yet. I might eventually if the folder gets so full you have to scroll far. But I link a lot within notes so I mostly jump around like that.