No - I still use them in a lot of applications.
They are good for the first 10 insertions.
The only reason I am having failures is because I have a testing station where I cycle the connectors over, and over, and over. Basically I will sit down with 40 boards and test them back to back - so my connectors get the shit kicked out of them. I use these extension as "sacrificial" connections so as not to wear out my test rig. For every 20 or 30 insertions the extension sees, my test rig sees only one
Move ahead - just realize that if you start getting some weird behavior it probably has to do with loose connectors.
P.S. I call a hollow pin (hermaphrodite) a socket. I know you guys are joking around - but I cant tell you how many tens of thousands of dollars I have seen wasted over connector sex miss-communication. Connectors like MDM & Micro Miniature have hollow pins and that is where most of the confusion lies... as each side of the connector has 3 different sexes... the shield over the insulator over the hollow pin over the hole inside...
Like having a hollow penis inside of a vagina that is actually a panina.