In The Netherlands it is exactly the same, just from a different vendor and with different branding. Of course the "not invented here" mentality resulted in it being woefully insecure when it was introduced in 2014, and NFC tap-to-pay with credit/debit cards, smartphones, and wearables still isn't properly implemented.

They now made the decision to completely retire the current RFID solution, because the chip vendor discontinued the lineup it relies on. Its replacement proprietary card is based on NFC tap-to-pay, so on top of terrible product compatibility during the transition period we're also getting a nice extra tap-in delay out of it.

Depends on where.

Many cities have their own cards, that are used for transit only (so no vending machines etc., and no interoperability between cities), increasingly many places just let you use your credit card in place of the special transit card, some places (Germany, some parts of Scandinavia) don’t have ticket gates at all.