2018/09/21: Regramming would be a fundamental shift in how Instagram works, not necessarily in terms of functionality, but in terms of the accepted norms of what and how to post. You could always screenshot, cite the original creator, and post. But the Instagram has always about sharing your window to the world — what you’ve lived and seen. Regramming would legitimize suddenly assuming someone else’s eyes.
And the result would be that users couldn’t trust that when they follow someone, that’s whose vision would appear in their feed. Instagram would feel a lot more random and unpredictable. And it’d become more like its big brother Facebook whose News Feed has waned in popularity – Susceptible to viral clickbait bullshit, vulnerable to foreign misinformation campaigns, and worst of all, impersonal.