I'm working on rebuilding a design that currently uses obsolete parts. I'm taking the opportunity to increase reading accuracy. In doing so, I will have to replace our current connector to go from a 2 wire resistance measurement to a 4 wire resistance measurement for a group of devices under test and increase max DuT capacity to fill the remaining multiplexer card slots. That will takes the design to a 96 pin connection. If I go to digikey and look up a D-sub connector that has 96 pins there's only 3 active parts. That doesn't bode well for longevity of the design, but then again I'm quite new to this so I'm not sure if that's a good indicator. Maybe it's as simple as large pin connectors are uncommon in general, but I'm trying to keep this a 1 connector design to reduce risk of operator error, wear and tear, and time loss.
Is there a place I can go to gage the popularity/longevity of a connector?