Original link: Linus Torvalds on C++ / old usenet posts.
(it was reposted to LinkedIn recently)
I read his posts as being mainly two points: non-portable and buggy libraries and hiding too much for kernel development. I think the library situation has improved in the 20 years since those two posts were made. But I also think that he has a point about hiding and kernel development - for kernel development it can be absolutey critical to fully control memory access and C++ simply does too much under the hood to make it easier for developers.