Actually, AFAIK Achebe’s essay is included in most modern editions of Heart of Darkness anyway, so you kind of have to go out of your way to not read it. It is exactly as dusty and academic as the novel itself. I know that is probably neither here nor there, but if anything the ideas he expresses in that piece are probably a lot easier for people to understand now than when he first wrote them down.
This x100. I absolutely hate it when people try to compose serious, complicated essays in a series of tweets. It is such an abysmal medium for communicating anything of substance, and I find it terrifying that so many otherwise intelligent people still use it that way (1/500000). Just write a blog post and link to it in a tweet for chrissakes.