Yes, I totally agree. NIH was rampant at Bell Labs in the 1980s. Management pushed us to use the internal tools rather than external tools we liked better. 3B vs Sun comes to mind. Datakit vs TCP/IP.
Mary Ann
Frankly, other than NIH, I'm not sure why the folks at AT&T decided to create pg a few years later since more was already in the wild, but at least it was a different program (Mary Ann's story of vi vs. se if probably in the same vein).