The OV-chipkaart will stay for now!
For the time being you can travel with your OV-chipkaart as you're used to do. We do keep up with the technology. We will let you know when checking in and out with the OV-chipkaart will change.
You should know that somewhere down the line your OV-chipkaart will have to be replaced, too. How that will go? We'll make sure to tell you well before it happens. Till then you can keep checking in and out with your trusty OV-chipkaart.

The OV-chipkaart will stay!
You can still travel with the same OV-chipkaart you’re already using. We do have to keep up with the technology, though.