True but counteracted IMO by VM technology

>Of course dropping of 32-bit support might occur even before the adoption of a 128-bit OS. Many companies had disabled the 16-bit subsystem on their 32-bit computers because of the potential risk from security holes in 16-bit software. There may be a similar situation where 32-bit apps get cut off in the same way while folks are still using computers running in 64-bit mode.
>
>>128-bit OS won't be commonly available for at least 20-30 years, that's my prediction. Too little profit both money wise and performance wise, way too high cost.