We still have yet to see if that will actually become a standard going forward. Sure there's probably gonna be some fancy games without loading screens doing crazy content-streaming tricks to show of the new console hardware, but in the long-term, studios may decide it's not worth the time and effort compared to just having a loading screen that loads the whole level in a big chunk.
Plus you're gonna be targeting a much wider userbase for the time being by not targeting SSDs.