Comment by geokon
I think this was maybe true a decade ago...
Having to contact them to get a license is a pain, and in benchmarks there are on-par or better libraries available. The tuning steps are baroque and if you really care about performance that much.. You'd probably look at GPU solutions
Are you expecting to do the tuning step during the build?
Last I checked their arm support was terrible.. But maybe that's changed
What I'm expecting: we have our own ad-hoc "build system" which is a shell script that configures, builds and installs all our dependencies (about 80 libs). That includes tuning the configure step of several different libraries.
Any build system that won't allow us to do this is unusable.