I believe you are mistaken. Denon did in fact stop playing with vTuner and please do tell us how to enter an internet address into the AVR without using this service.
Secondly, vTuner has also stopped sipporting multiple browsers as well. I use Firefox for example and it worked fine until Dennon dropped out and not it does not work at all. Try it yourself.
I certainly don't want to use something like Chromecast. I like streaming music 24/7 and not just a tune here and there. There are hundreds of free internet radio streams available for about any user or occasion.