So (had to look it up) Reader was infamously the shuttered project that first caused a lot of backlash...that went for 8 years. They closed it due to "declining usage" i.e. they could not monetize well.
Play Music died after 9 years, and that even featured paid souscriptions...the logic of "paid for and around" doesnt seem to be a solid argument, esp for a company making money primarily off of data - as of 2021 their cloud business is only 5% of their revenue, ~74% of their revenue is ad based the rest is devices (nest, phones), and Youtube.
I think its pretty reasonable to be concerned about the longevity of this product - maybe we will be wrong, but.