Thing is, S25 has been released this year and is designed for more powerful software. A56 which is a midrange but powerful phone has been updated, also released this year. ZFold 7 hadn't been released yet, if there will be one at all, but it's only to be expected to be released on UI8. Newer devices usually are released with the latest software or are designed to cope with next years updates, older devices and also more budget phones face challenges to cope with more demanding upgrades because they are hardware limited. Samsung phones are well equipped memory wise, it's the hardware that gives powerful phone. Although midrange and budget phones also deliver satisfactory customer quality, as with every brand, for premium features you have to pay more.