It just depends on your definition of "solved". If solved means "all consequences of anthropogenic climate change avoided" then it's obviously too late, there's

It just depends on your definition of "solved". If solved means "all consequences of anthropogenic climate change avoided" then it's obviously too late, there's no solution other than time travel. If solved means "humanity survives as a species" then we're in pretty good shape no matter what we do. For most people I think solved means "we avoid the worst effects", which of course leads to another question about definitions. Many people look at the graph in your citation and see it as a picture of success, because the baseline in their mind is RCP8.5. Note that the graph makes a comparison to RCP2.6, which is not a "do nothing" scenario, it's a pretty optimistic and aspirational future.