When you’re dealing with that vintage of software it’s not a matter of rebuilding the program to target a different architecture. You’re talking about emulation.
They probably instead were opting to remanufacture chips with support for the original instruction set and none of the quirks of emulation.
Who says they do?
https://www.pcmag.com/news/why-didnt-sega-make-a-saturn-or-dreamcast-mini-blame-the-pandemic
When you’re dealing with that vintage of software it’s not a matter of rebuilding the program to target a different architecture. You’re talking about emulation.
They probably instead were opting to remanufacture chips with support for the original instruction set and none of the quirks of emulation.