>The files are huge—up to 15 gigabytes each—so as a general rule, nobody downloads them.
This is not the reason and it's hard to call 15 GiB huge in 2026. Plenty of people download video games or stream television series that are more than 15 GiB.
I think it's well worth noting that while streaming does imply a full download, it doesn't actually render the full sized download on the client device at any one time, it's simply cached and then the oldest parts are evicted when the cache fills up.
You've got to place that within the context of Sub-Saharan Africa.
HuggingFace and access to a fiber connection changed my concept of "large downloads". I can easily grab a 20GB model within a minute or two now, same for big Steam games. Meanwhile my childhood self was hyper aware of loading images and other assets that would bog down our home dialup connection.