A very good point on storage space! I also Think the other benefit is only needing one scope if you’re willing to quickly adjust your zero.I thought this would be a thread about double rifles, bockdrillings and vierlings, not switch-barrel rifles.
The latter are a compromise, but they can have real utility when storage space is limited: for once, you can put more "rifles" in s cabinet than the manufacturer claims!
I personally have no issues with my Sako quad, it’s pinpoint accurate shoots just like you would expect from any other Sako rifle. Again I’ve not swapped it about tho, so can’t say if it has negative effect but I think with it’s very simple reference faces for alignment it won’t have much if any negative effect.
