I think "Watson" was never a thing (a technology or a product). Rather it was a marketing term. "Watson" meant any solution or research project that was develop

I think "Watson" was never a thing (a technology or a product). Rather it was a marketing term. "Watson" meant any solution or research project that was developed by IBM and had remotely to do with AI. A bit like "Active*" or "NET" back in the day for Microsoft.