Re: Electric guitars need to sound good acoustically to sound good plugged in...
why do you care what it sounds like when it's not plugged in if you're going to be using it plugged in 99% of the time? ..... If you wanna hear how good it sounds quit goofing around and plug it in.
I care very much about how it resonates acoustically. I have always played electric guitar maybe 75-80% of the time without using any form of amplification, for the last forty years. (who needs to hear someone practicing scales and riffs for hours through an amplifier, not to mention practicing at 3 a.m. in proximity to other people?) Playing an electric acoustically has allowed me to become intimately familiar with every aspect of how the instrument responds in my hands before it reaches an amp, so that i know exactly what i'm sending down the cable to the electronics. That knowledge allows me to tailor the electronics to bring out the qualities of the instrument a lot better and a lot faster.
It also allows me to separate the functions and responses of the amp, the guitar and any effects, and my thoughts are that that allows me to get more, in total, from the gear. I can get more in depth with a lot less effort because i have a more detailed understanding of each part of the chain as individual units. Having the intimate knowledge of the guitar's response also can be very useful when using (for example) a borrowed amp, or a provided amp at a jam session, i.e. an unfamiliar amp.
Viewing the guitar/ pedals/ amp/ speakers as one sound-generating unit also works, and no doubt that's how may people play electric guitar all the time, maybe even 100% of their playing is done with the complete rig switched on. I'm sure that works quite well, but there would be limitations. For example, the rig sounds boomy or too toppy ... there could be several areas in the rig where that could stem from ... is it the guitar ? the amp ? some pedal setting ?
I'm sure many people use each method for many reasons, or simply because that's what they've always done and never given much thought to alternatives. But from my own journey, I can certainly say that I have never been 'goofing around' when playing unplugged ... in fact i'd say the opposite .... all my major advances in playing have come from working at stuff with the guitar unplugged. The better i can handle a guitar unplugged, the more in control i am when plugged in, and i sound better for it.
These are just my worthless opinions. The only thing i will say in my defense is that i can play my guitars into just about anything and always get good sounds because i know my instruments intimately, and a huge amount of that has come from playing them unplugged.