Comment by jsheard

Even when using forward+ style rendering it's still common for certain effects to get handed off to deferred passes, which precludes easily supporting MSAA anyway. For example the recent Doom and Call of Duty games use that hybrid approach, so you won't find MSAA support in them despite their use of forward shading.

It's very rare for games to be 100% forward nowadays, outside of ones specifically built for VR or mobile.