Various people tried the PC+ scheme in the US and had limited success. Tandy probably came closest. Sinclair and Acorn were extremely ambitious. Acorn even sol

Various people tried the PC+ scheme in the US and had limited success. Tandy probably came closest. Sinclair and Acorn were extremely ambitious. Acorn even sold an NTSC conversion of the BBC Micro in the US for a short time. My theory is they were undercapitalized.