Obsolescence Planning for Several Legacy Product Families - National Instruments http://www.ni.com/product-documentation/53722/en/
From the page above, you'll see that NI has made the tough decision to announce the end-of-life for a number of quite legacy products in 2018Q4.
Please work with NI and your local account manager (mark.kaschner@ni.com) to collaborate around options for mitigating impact of any obsolescence scenarios, which usually amounts to some blend of spares, long-lifecycle HW service plans, or upgrades.
Related links on our lifecycle policies are below...