The time has come to update our minimum requirement on C++ standard to C++17 from current C++11. Compiler support for the standard is very good. Latest versions of GDAL and PDAL now requires C++17, and so will the next version of GEOS. I see no good argument not to make this move to enable use of the new features of C++17 (and in extension C++14).
Please review at:
Best,
Nicklas