Arguably it’s no more relevant than is the fact that there are a dozen other podcast apps out there. The podcast feature in YTM already exists and is distinct.
This change means X number of people need to go looking for some alternative, and given Google’s lack of ability to keep any product alive long-term besides Gmail, YouTube, and Search, YTM should arguably be the absolute last one on your list to consider, since we all know it (or its podcast section) will be replaced with something else within the next five years, just like nearly every Google product.