Judith Curry is one of the most prominent skeptical scientists on AGW. Cherry-pick the page at will
I considered linking it but didn't have the audacity to do it! I'm not linking the top skeptics! 
Still, anyone just reading this exchange about it, will now understand a few things they didn't know before:
A) RCP 8.5 is an economic and social model, more than a climate model.
B) It's one of several models about how the world may go in the future.
C) It's the most pessimistic model; which, according to the Curry page, paragraph #1, is "a useful worst-case scenario,
but not 'business as usual'".
D) All media stories and infographics and similar "climate porn" will invoke the shit out of it, and not mention the other models.
E) Doing that is disrespectful to the science, and anti-informative to the reader.
Good thread!