I find that I hardly ever use this stuff nowadays.
Instead I wave my phone at one of these. If I really have to (some purchases over €30) I use an actual card.
I went to Sweden recently, didn’t exchange any currency in advance and had no need to acquire any Swedish kronor while there either. You can use plastic for just about anything, even if you buy from a little market stall. If you live there you can use a personal bank transfer system called Swish for personal or small business transactions.
So is Oppo going cashless?