The 128k Mac has such a cache as the "Original" Macintosh, that people forget how useless they were by 1987 or so. If you were trying to use a 128k to actually accomplish things in the late 80s, you at least took it to 512k as soon as you could, and by '91 or so you could literally find 512k boards for $25 in the electro-junk shops, left over from people who had upgraded to pluses.

The 512k is what Steve demoed 30 years ago Friday (it's not what Apple sold, but it is what he demoed), so it's original and usable!