Speaking as personal anecdota:
>Google Play Pass[0] is basically the app equivalent of Spotify. One monthly or annual fee for access to a library of "hundreds" of apps.
At the risk of dating myself, this is not a way I/my social circle consumes 'apps'[0]. But by the same token, if I were to subscribe to a service like MSFT's GamePass[1] personally I would find the most value in a service with everything, and be annoyed at having to juggle multiple subscriptions. The multiple services make it difficult and expensive to enjoy a breadth and diversity of media, regardless of total amount/quality consumed. For instance, imagine how obnoxious Spotify would be if it broke up into different services by genre.
By extension, I'd always pay more than my current given subset of subscriptions for an 'everything' service.
> And movies, TV shows, and music can all be purchased a la carte, not just through streaming subscriptions.
Certainly, but back when I purchased such things a la cart I'd have no problem cross shopping redbox/blockbuster/amazon. Probably because I only ever have to engage one and that engagement ends after the transaction, until re-initiated by myself. Maybe it's a psychological hangup, shrug.
[0]Not that I 'consume' many apps, or interact with the stores often. I think of them (sans games, and novelties) as little more than glorified websites. An 'app', as I use my phone, is just a glorified gateway to either data delivery (e.g. Netflix) or other backend traditionally and adequately served via website (e.g. google calendar)
[1]Google Stadia manages to be the worst of both worlds here, trying to be a service that also requires a la carte purchasing, instead of one or the other.