Diablo 2 resurrected is supposed to use the old code with a “graphics” uplift. When it first hit they were having some battle.net issues, on the blog they spoke

Diablo 2 resurrected is supposed to use the old code with a “graphics” uplift. When it first hit they were having some battle.net issues, on the blog they spoke about dealing with legacy code and challenges. Hopefully, for D2 this means a lot longer life.