Aside from their appeal to European gun owners because of their ability to represent several rifles counted by authorities as only one, there is some additional benefit in switch-barrel guns in having the same basic rifle and scope in several different chamberings so that it comes to the shoulder and eye identically from one chambering to another.This modular trend strikes me as just another dumb millennial thing and Beretta jumped on the bandwagon. Rather than adjust and tweak a good build as they did moving through from the L61, to the A1 through A5, the 75 and 85, they reinvented the wheel and started all over again with another economy Tikka base.
As for aesthetics, I personally prefer a one-piece stock over the two-piece version on the Sako 100 (and some other European switch-barrel rifles) as seen on this Schultz & Larsen Victory switch-barrel model:

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