They say it has infinite scalability... never been true. They can't handle more than 10.000tx/day (current max while they advertise 7000ts/s).
Infinite scalability is in theory, in real world you will run into problems with slow hardware, internet, maybe consensus voting slowdown.
Decentralized 7000ts/s would be really something great. Till we run into problems with scalability, XRB is going to sit on BTCs place. In case everything will go well ofc.