This is true, but for desktop and laptop compute, I'd estimate something like 95% of users won't change the defaults. I'm also not sure how good our solvers are

This is true, but for desktop and laptop compute, I'd estimate something like 95% of users won't change the defaults. I'm also not sure how good our solvers are on clusters, but on desktops, the Julia versions are often faster than MKL which is the faster BLAS outside Julia that I know of.