Considering that we've moved from wire wrapping to being able to design and order multi-layer circuit boards, and we've gone from 74 series and basic PALs to CP

Considering that we've moved from wire wrapping to being able to design and order multi-layer circuit boards, and we've gone from 74 series and basic PALs to CPLDs and FPGAs that regular people can program, I don't think what tinkerers can do will hit any barriers any time soon. The ability to recreate classic computing is wonderful, both in preservation of history and in making things available to people who hadn't even been born when these machines were new :)