Yeah, that was my experience with the '01 LB7 I owned. ~180K miles on the OEM sprays before the tell tale smoking at the pipe. Couldn't find "new" injectors- only rebuilt Bosch, which lasted 60-80K miles. $4k each time at the dealership until I did the last swap myself- with new feed pipes. Dual filtration and consistent use of FPPF additives helps a little, but.....
"Chessy56"
So. Milwaukee, WI
'01 2500HD, LB7, ~440K miles
"Stock" engine. Dual fuel filtration system with Kennedy lift pump, BF Goodrich Commercial T/A Traction tires (sold to a dude from Texas- it's living a warmer life just fine down there now!).
'17 2500HD, L5P (Happy Birthday/Merry Christmas to me!!!) Currently bone stock, 120K miles.
"Socialism is a philosophy of failure, the creed of ignorance and
the gospel of envy. Its inherent virtue is the equal sharing of misery."
Winston Churchill