Some manufacturers do use evolutionary approaches in the design process in varying capacities.
But there are other factors to consider when it comes to mass-produced products. One of the drawbacks of the evolutionary approach is it may not produce outputs that are feasible in a mass-production scenario.
I gave a similar response to Mr Razor, - that's the point, the overwhelming majority of truly random mistakes will always be deleterious,- the only way it works is as part of the design- random selections applied and constrained to a pre-defined range of viable options:
e.g. paint color, upholstry, extra trim
or
eye color, hair length, ability to roll tongue... very important!
= adaptation as a very useful design
feature, not a design
mechanism, =completely different process.
and one does
not extrapolate smoothly into the other
In the sense of macro evolution being the formation of distinct breeding populations (e.g. speciation) we can and have observed that.
true, but 'distinct breeding populations' is a far wider definition- I recently read about a new species of Finch being declared as evidence of 'speciation in action' purely on the basis that none of the rest of the species seemed to want to mate with it... by which definition I spent several years in college as an entirely distinct species of human.
In the case of evolutionary time frames well beyond our own life spans, sure we can't necessarily observe that. But that's where things like modeling, simulation, and other things comes into play. It can allow us to explore things that we otherwise cannot do in a practical fashion.
Scientists can even are recreate ancestral genomes to directly explore evolutionary pathways to determine how specific biological features evolved. How cool is that?
There's also the fact that life has left traces of its past history in various respects (e.g. genetics, fossils, geographical distribution, etc), which further gives us evidence of how life evolved over time.
As Raup said- if we define evolution merely as change, it has certainly changed over time, how is another question.
Let me ask you this:
If we dig down and look back at the record- and we see shared traits, common features, some vestigial features, dead ends, even some regressions, but a general trend towards more sophisticated diversification over time- what does that suggest to you about the nature of the evolutionary process?