I mix new and more traditional techniques, it really depends on what I'm doing and what I'm in the mood for.
If I'm doing repetitive production work where the clients are either not willing to pay for, or see no value in doing things the more "traditional" way, then I use whatever method minimizes my labor, yet gives me comparable and satisfactory results. If I think doing something with more modern equipment will truly devalue the work (in my mind), then I will do it in a more traditional method.
I often reach for the hack saw or file in the shop, but a lot of times it's because I don't feel like getting extension cords out or I have some fine tuning work to do. If I have to cut 20 pieces of angle.....I'll leave the hack saw where it hangs and plug the band saw in.
If I'm making a single piece for myself or as a gift I often try to stick to more traditional methods because I can switch my business mind off and recongnize that I'm working for "fun", not profit. This is real important to me so that my work doesn't just become another "job".
If I have to cut something that would take me an hour with a hammer and cold chisel, twenty minutes with a cut-off blade on a grinder or ten seconds with my plasma cutter.......well......call me a poser