Even if you have path tracing, the "primary" rendering (ie seen triangles) will almost surely use classic rasterization because it's simply so much faster still w/o any real downsides.

Secondary rays (GI, non-planaer reflections) though are quite hacky to accomplish with rasterization and benefits immensly more from the availability of raytracing extensions where your "only" problem is that you can't sample as much as you'd like so you need to converge a solution instead.