IME larger filters increase dynamics. Especially on lower frequencies. This isn't automatically good. WRT guitar amps, big dynamic bass capability can lead to wolf notes and woofy tone. The limitations of most guitar preamps, the speakers and even the instrument itself, and especially in combination, are prone to several conflicting resonant points in the bass and low mids. Smaller filters help squelch this effect. And though "dynamic" is often used as a positive description of guitar tone, truely dynamic amp response for guitar actually sounds cold, flat and uninteresting. Some kind of envalope of attack is needed to make the amp an instrument and not just the bland reproduction of what guitar and pickup are putting out. Contemporary overdriven guitar tone has A LOT more bottom end in the final, post overdrive EQ. The current trend seems to me more filtering in the power amp and more careful EQ sculpting in the audio circuit to get this result. Whereas once upon a time, when larger filters simply weren't available, guitar tone was molded by the limitations of the amp as a whole. Call it a happy accident. So , smaller filters being used in guitar amps probably continued (and continues) to be typical because it works as part of the tone/dynamic shaping formula.