I find that the S60, V60 and XC60 have nice interiors with above-average fit-and-finish and strong material quality, but I'm the first to admit that the S90, V90, and XC90 are noticeably more 'posh' to sit in. The emphasis does seem to be on durability over the more 'jeweled' look of Audis and BMWs. This may also be a natural phenomenon as the design ages -- doesn't look quite as flashy as it did when it debuted. For me, the difference is in the Nappa leather. Without it, the interiors don't feel quite as luxurious as they should; with it, for whatever strange reason, it all comes together.
I'm sick to death of mechanics bashing anything other than Toyotas. Reliability is not the main criteria for some car buyers. It's important, but there's more to life! I do think the 48V system is a new wrinkle, but the concept has been in use for years now. I'm of the belief that it's for emissions, not fuel economy, and that it DOES serve a purpose. My father, longtime Euro-car skeptic, mentioned that he'd seen this video and that the mechanic characterized Volvo's engineering as extremely quirky. That there was an insane amount of cooling, and that things were in funny places. I'd rather have a lot of cooling than have a Toyota which rusts out after 8 years. (Ask me how I got that data point.)
Sorry to go on a tangent. Long story short, I have no qualms with the interiors of the recent Volvos, but I don't particularly care for the basic leather option. Volvo's new faux stuff is actually much nicer.