Let’s not forget that for vinyl anyway, the tapes used for the cutting were very often a copy with bass rolled of so the phono carts of the time could track it. New vinyl masters don’t require that since cartridges are better today and it’s a seen as luxury item with more spent on gear.
A to D converters back in the early days of digital were not nearly as good as now, and of course there’s higher transfers than 44.1/16.
I’m not saying some remasters don’t take a step backwards sonically, but there’s often no reason why it has to be that way.
A while back I heard the new Peter Gabriel remasters.
I would have bet that they were remixed from multi-track, since it was such a huge sonic upgrade from the first digital masterings. I posted on the Steve Hoffman forum about it and was told there was no remix, just a remaster.
Plus today we have better cables and power conditioning available, so if a remastering studio uses these, it should be beneficial.