Currently hosting really isn't an issue in PC 2.0 and if no one wants to use Nostr then they won't be interested in Nostr.build either. We're not going full Nostr and I don't know how much we will add. The lightning wallet solutions Nostr provides are what we're after currently because that's what we need but building solutions for people to host content and build RSS feeds so apps can surface that content were game for.
I'm also not that familiar with Nostr.build but if we need a hosting service you'll be top of mind.
I think most people just host their media on their websites currently.
Podcasters are used to hosting their own stuff either on their own or using a hosting provider so that's all just transferred over to the music stuff as well since music is just an extension of PC 2.0.
People around here just stopped using Spotifys Anchor hosting for their podcast within the last years btw.