@audioquest4life
Where I see that as a drawback, is if the speaker is rated at 8 ohms, but dips to 4 ohms, yet your amp does not have a 4 ohm tap, nor has good 4 ohm performance with the 8 ohm tap. Then, you could run into a mismatch as the speaker dips down deep into the low ohm range.
What about a 2, 4, 8 ohm amp like the Yamaha AS-3200 that only has a single pair of taps? I thought a single pair of taps applied to all the ohms the amp is rated for?