I like the idea of doing it with a coping saw...it's just that in practice i don't seem to be very good at it. However, the part about the "scary" resonates. Everyone these days seems to be using trim routers...but my go-to router is a 2.5hp Makita-clone plunge router. It's like using a lawnmower engine to route. I have tremendous respect for it, the same way I have tremendous respect for mountain lions and bears. But the good thing about it is that it's weight seems to make it quite stable. My scariest tools are the ones that either have a tendency to jump/kick back, or make pieces fly off. My trim router has a tendency to catch and jump, which can be very distressing. I feel like I should invest in body armor working with the table router, even though it's half as powerful as the plunge router. But the scariest of all is my spiral saw:

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There is only one good thing about this tool. With a proper base, it can be used like a router to cut curves, without making as wide a cut as the router. You pay for it because it really wants to jump out of it's track, base or no base. It spins much faster than a drill if it jumps or gets out of your hand that little blade could do some really nasty damage.

Not much potential, by contrast, for a coping saw to land you in the ER.