It's difficult to answer your question, but I bought an iFi SPDIF iPurifier 2 when I had an old Revox CD player from 1990 used as a transport knowing that it would most likely really benefit from it. And indeed it did - and it did even more when I replaced the iFi wall wart with a 35$ 5V low noise linear PSU from AliExpress, fed through a filtered power strip.
Last June I bought a modern transport (Audiolab 6000CDT) and, according to some, the iFi iPurifier wouldn't be needed anymore, modern DAC + modern transport... yet I find everything sounds better with the iPurifier in place. YMMV, as always, but it costs nothing to try since you already own it, and I doubt it can be detrimental...