First, I was talking more towards the general readership than you specifically.
Second to respond:
"Uh? Where did they not accept cash?"
As a tourist I mostly went to restaurants, cafes, and museums. The grocery stores still took cash but the other places not so much. I had to make a decent effort to get rid of the remainder of what I had prior to my departure. Tourists and locals often don't have significant cross-overs, so that might be the difference in our experience.
I defer to you of course on the actual experience of cashlessness. I wish you the best.
When I was in Stockholm and Uppsala in 2019, all supermarkets I visited had signs posted saying that they do not accept cash. Around the same time I read an article from an American newspaper (New York Times?) about how, for example, even Swedes selling coffee at events could easily get payment terminals and no longer wanted to take cash.
> Using cash was a challenge.
Uh? Where did they not accept cash?
> 7-day public transit pass
This doesn't exist in every city. We don't have it for example.