Musical Fidelity X-10 V3 Tube Buffer why was it discontinued from Musical Fidelity?

I have 3 Musical Fidelity X-10 V3 Tube Buffers and they make a night and day improvement in my audio sound. I bought 2 new at the time and because they are no longer Manufactured, I bought a third one used on Ebay just in cas. My question is, why since this was a successful product and sold out, did Musical Fidelity quit manufacturing them? I'm more curious then anything else as a businessman and also a music lover. "To save the village you must destroy it"