A rule made to force creative use of equipment and avoid cliche:
When a piece of equipment appears on the market and seems to be able to do exactly what you were hoping for, then you should refrain from buying it.
If you can't help it and buy it anyway, don't use it for what it was marketed to do.
PS: When such a piece of gear appears and I feel the G.A.S rise, I turn to my existing gear first and see how I can reproduce a comparable tool with the equipment I already own. It's usually very stimulating and it's been a driving force to some of my VMC patches.