I'm not exactly sure what's more "nebulous" about the timing for consumer chips. This timing is specified for both the consumer and server chips in the same sentence in the press release: "These changes will begin with our next-generation Intel® Xeon® Scalable processors (code-named Cascade Lake) as well as 8th Generation Intel® Core™ processors expected to ship in the second half of 2018." (I guess the nebulous thing is exactly which 8th generation Cores will have the update.)

Perhaps a bit of a dark thought, but fixing existing processors means you might not buy their new 'fixed' processor.

As a result they are not that motivated to fix it as well as they should.