In my opinion, the second is just not true.

If a reliable feature is evolutionary advantageous, then new systems will come about to take advantage of that (and may out-compete old systems, indeed, to the point of extinction), I agree.

But, if a reliable feature isn't evolutionary advantageous, it can be ignored or even removed.

Negative features may need to be managed, rather than taken advantage of. Examples: ionizing radiation, landfill.