I think it makes sense for Eigen to embrace modern C++ and require c++14 (17?) in new versions.
But ... I'm a little sad I won't personally be able to use those versions for a long while. I have a customer with a lot of stable systems that won't/can't upgrade compilers but still pays for maintenance/improvements of code written for them. It would be nice if a c++98 or c++03 branch was minimally maintained for bugfixes, but it seems a waste of time to do much more than that for the older standards. -- Mark
