Why would you? Back then, keyboards weren't peripherals. Now they are. Restricting peoples choice doesn't make sense. Get whatever keyboard you want. What's stopping you from using whatever keyboard you want? Nothing, at that's what progress looks like. Buy whatever keyboard you want.
Right it's a computer. Where parent misses the point is he can buy an old TRS if that's what he wants or he can try to build one himself. Wondering why people aren't building custom keyboards and 4x8 displays or whatever is pretty obvious, it's not 1972.
