Throwing slack / spotify / vscode / steam / whatever else on top of that could easily bump it up several more gb. VScode is pretty good, up until you start adding in language servers. The quality of the rest is really hit or miss.

Edit: Out of curiosity, I opened steam, and it immediately took up a little bit of ram, then by the time it finished "loading" it ballooned up to a gig- presumably because of all the fancy animated images and video players and what not the storefront needs. I could definitely do without those things, though I imagine they do correlate to more purchases (there's a name for it, I forget- something about moving images triggering a capture of attention going back to hunting / fight or flight response).