It may go even further than that. Google has to produce multi-million line programs and maintain them for a decade or two. That's not a problem that most programming language researchers face. If researchers think about that, they usually do so in the abstract, rather than from a position of personal experience.

One place this shows up: Build times. Turning a 45-minute build into a 10-second build, times 30 programmers, times several builds a day for 10 years... that adds up to a really big difference.