I saw this on another thread (thanks Paul) and thought it was worth highlighting.
You can now use your credit card to pay for public transportation in Lisbon. No need for the Navegante card anymore.
https://www.metrolisboa.pt/en/ride-on-metro-lisboa-with-contactless-payment-card/
https://www.portugal.com/lifestyle/traveling-in-lisbon-by-bus-or-tram-just-got-a-whole-lot-easier/