Not trashing Valve's approach, it works great. More just saying that when doing something as difficult as maintaining old code, being good is more important than being new. Source 2 and all the COD engines are good engines based on good game engines. Stock gamebyro shits the bed on any PC that isn't a single core 32 bit Windows XP machine
Valve does make substantial changes when they are needed - latest example is the switch to mesh-based maps instead of BSP trees in Source 2.
Not trashing Valve's approach, it works great. More just saying that when doing something as difficult as maintaining old code, being good is more important than being new. Source 2 and all the COD engines are good engines based on good game engines. Stock gamebyro shits the bed on any PC that isn't a single core 32 bit Windows XP machine