I am a huge Stillpoints fan for my speakers but are they effective under components?
I have been using footers for many years. The most significant use IME is decoupling speakers from the floor.
I will never forget putting Mapleshade large brass footers under my $30k, 200 pound Tannoy Westminster Royals. By preventing the bass, etc. from leaking into the floor, it turned my $20k speakers into $30k speakers!
More recently using Stillpoints. But yet to pull the trigger on SP footers under my electrical components. Is it worthwhile to do so? I do have them under my turntable and using the excellent record weight. Understand the physicality there. But more hundreds for my amp, preamp, etc.?