I think reflexive appeals to tradition and novelty are both kind of dumb. But if people are going to err, I'd rather they erred on the side of tradition: at least that shit has been demonstrated to work in one fashion or another. I always try to keep in mind examples like Eben Byers [1], the THERAC 25 [2], and rabbits in Australia [3]. All sorts of stupid ideas look appealing at first.
[1] http://en.wikipedia.org/wiki/Eben_Byers
[2] http://courses.cs.vt.edu/cs3604/lib/Therac_25/Therac_1.html
[3] http://en.wikipedia.org/wiki/Rabbits_in_Australia#Effects_on...