I'm in the process of upgrading a number systems using MDL2 modules and intend on using a MD4/XA2 combination in its place. Since this upgrade is largely due to the obsolescence of the MDL2 units I am concerned about the product line expected lifetime for the MD4s and XA2s. I remember that the MDL2s appeared to become obsolete rather suddenly, so are there any plans to make today's MD4 or XA2 modules obsolete in the next 5 years? 10 years? How would we find out when/if this status changes in the future?
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