Aussie here. One reason I use PayPal is for subscriptions (streaming services etc) to avoid the headache of updating credit card details in multiple places when I change bank, credit card renews, etc. just change it in PayPal once and every subscription keeps working.
Except that you can …
Cancel auto payments
Edit: I get you. You mean multiple cards within PayPal itself per vendor. Yeah, that seems like similar effort but at least you can see everything in one portal. I have a single card linked with just enough limit to cover subscriptions and the odd internet purchase.