Just a personal response of mine, with no way for me to measure this, but it feels that Sequential would likely have invested the minor amount of engineering resources to continue the Prophet X. The reason that i’ve read for them dropping this product is “due to the unavailability of several key components”.
More about the discontinuing of the Prophet X in this thread :
Other companies deal with parts being discontinued all the time, without closing out a product line, especially a distinctive one like this. This feels to me a corporate change – which they are certainly allowed.
But what would Dave have done ?