I read it, and I read it again. I can't see why anyone would want this. When syncing Bitcoin Core, you sync everything. When using an API, I assume you're looking for specific parts, and the parts you're looking for shouldn't be altered. So I see absolutely no use for this.
When bitcoin core 30 is implemented (it's already scheduled to) the OP_RETURN limit being turned off will result to unlimited amounts of data being added in a block and utilizing the witness discount.
Ordinals become obsolete. There will be no more need for stitching together 40 byte inputs through third party tools and external implementations. This means that anyone storing the Blockchain in full could potential have entire images or files of whatever has been uploaded. And yes it's no lie that this can result in harmful files which many parties would be interested to filter.
As if everyone hadn't been warned before this being implementation on core 30. This makes bitcoin prone to sabotage and nodes even more centralised.