Immediate vs retained is not about "modern" vs "outdated", both are about as old as computer graphics themselves. One is better in some cases, the other in others.
In any case, the fashion (for the last ~10 years) is to consider immediate mode the modern approach, and retained mode an awkward practice of the 90s. So you can call "immediate mode" a lot, but you can't call it "outdated" when most consider it the new black...
In any case, the fashion (for the last ~10 years) is to consider immediate mode the modern approach, and retained mode an awkward practice of the 90s. So you can call "immediate mode" a lot, but you can't call it "outdated" when most consider it the new black...