I am sort of in agreement with you on this. It is something I have been thinking about recently. "Modern" computers, even some of the oldest, still can take advantage of the latest tech. The only reason vintage computers are not like that typically is only because support was dropped. If TI99 class computers continued, having new motherboards made, new features added, while still natively (even cosmetically) compatible with the earliest variants, would that matter? It seems like a Ship of Theseus issue. OTOH, it is fun to mess with "era specific" hardware, even if "eras" are just a crude discretization of temporal continuity.