Yes, the differences between C++14 and 98 are night-and-day different.  Quite a few important language features, and plenty of new libraries (including threading and lambdas).<p>There aren&#x27;t any (AFAIK) explicit breaks of &#x27;98 code in &#x27;14.  So the theory is that code <i>should</i> compile with the new compiler fine, but you&#x27;ll likely hit some issues.<p>Check out Scott Meyers book: Effective Modern C++ for the deltas.