Yes, more big players like PS Audio are shifting toward SMPS as well, because of higher efficiency, lower noise, compact size, and faster transient response to dynamic power demands. But the question is whether the one used by ICON is up to that level - which I doubt is the case.
Not sure if others have launched the same effort but here is one:
https://teddypardo.com/product/bluesound_icon_upgrade_kit/