My opinion?
Don't fix it if it ain't broke!
Unless you're experiencing symptoms of injector problems why go thru the hassle of replacing them?
Hard start/no start
Rough running/misfire
Smell of diesel fuel
Excessive smoke, black or white
Poor performance, excessive fuel consumption
These days, with corporate cost-cutting, consolidation, supply chain issues, the new injectors may be inferior to what you have.
Where did you hear that injectors must be replaced at 150,000 miles?