$300 will also get me a used mini PC[0] with 2TB of storage[1] I can set up at home in an evening with Navidrome+Audiobookshelf and not have to buy a phone with massive storage at all! :D
And as a bonus everyone in my family can listen to the same collection without having to upgrade to a 1TB phone. And I can use the same source in my car, on my laptop, desktop etc. All without having to waste 400GB of space for music storage on every device.