Agreed. Read all his stuff as a teenager. Jerry Pournelle is at some level a Heinlein protege, runs what was arguably the first Internet blog, and brings to light many news items that tend to document Heinlein’s accurate prognostication.
Yep. Do NOT miss Pournelles anthologies There Will Be War, of which there were around 10 volumes. See also Spider Robinson's material, his most recent compilation of essays is entitled...The Crazy Years.
The idea of what sort of blog or other internet presence Robert Heinlein might now be producing had he survived into his centennian years he was born in 1907 so would now be 101 years of age] is fairly awe-inspiring. But I suspect it would sound quite a bit like Jubal Harshaw, Lazarus Long, Bernardo de la Paz and Colonel DuBois from Starship Troopers all rolled into one. As it of course should.