Really, so anyone using a higher level language for line of business apps isn't doing serious commercial programming?
Well, IMNSHO business apps (I take it you mean "enterprise apps") are not the epitome of programming, much less serious programming. Especially in-house apps.
But it should be obvious from my description that with "commercial programming" I meant the end user market, and things people used to buy in a box or (now) download to run on their Desktop. Not, say, some IBM Java based toolset for the enterprise.
So stuff like MS Office (or LibreOffice), multimedia apps such as Premiere, Photoshop, Avid, Cubase, all modern browsers, AAA games, etc etc.
I'd reverse that and say the polished, packaged apps are the exceptions, these days. Code behind webservers and business backend processing is the code that runs the world now. To see C++ used in such code is pretty unusual. I do think C++ has its place: kernels, drivers, numerics. Not much else.
I don't know, everybody who's doing serious commercial programming seems to doing OK with C++, for stuff from Photoshop to Premiere, and from MS Office to AAA games and super stable and fast multimedia apps, like Cubase, Studio One, Reason et al.
In fact, OSes aside, more programs of this kind (full featured applications used by billions of people) are written in C++ than in any other language, including C.