Depends a bit on where you are, in my experience. In Melbourne I had a few instances where they didn't take card (so I went somewhere else), whereas I've not yet had that in Brisbane (I paid $1.50 at a coffee shop on card this morning).

Probably the only place where I use cash now is Sunday markets, but even there, most places now take card.

Interestingly, there's also a few places here which are either cash or contactless card only, including the cinema.