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I tell myself that eventually everybody and all companies will use Prolog for many things.
Maybe indeed the question is wether that is soon enough as you say.
Currently we, me and my companion are building a webservice completely written in swi-prolog.
In this example we need to do a lot of data inferences on the server to display intelligent data to the web-end-user,
we use a lot of data-files which, at the moment, we completely load into memory, the data queries we perform in this case would almost be impossible in Mysql as a mysql Query, ( it would get to slow,
Or the query would become absolutely unreadable, and also impossible to extend further )