These examples don't show a sensor problem or deficiency. Today's sensors are perfectly adequate for these tasks.
While it's true that there is sometimes more DR in the scene than the camera can capture, I can honestly say there have been very, very few situations where an extra two stops of DR in the ISO 100-800 range would have done the job. For openers, about 50% of my shots are at higher than ISO 800, where the DR of the 'inferior', 'lagging' sensor in my 1D X delivers greater
DR than the D800 or a7R. In the majority of those situations where there are more than 12 stops of DR in a scene that I'm shooting at low ISO (which was the case when I was out shooting architecture last night, actually), there are also more than 14 stops of DR in those scenes (last night, the guy next to me with his D800 was shooting multiple exposures for HDR, just like I was).