two words - job security I've been in many orgs where engineers like to reinvent the wheel. Just so they can claim ownership over more components, add polish t

two words - job security I've been in many orgs where engineers like to reinvent the wheel. Just so they can claim ownership over more components, add polish to resumes ("Led project to rewrite X to scale", "built X from scratch") and makes them look busy. When it comes to perf reviews, or when it comes to job cuts, they'd likely survive given they know more / built those components.