it's not even like a lot of code necessarily but even ignoring the vast size of my github archives the things i am actively piecing together over on gitlab are an awful lot of power for a system which has one user who is mostly coding things for her personal websites
and this all really comes down to good initial design and the longevity guarantees baked into javascript. maintenance costs are virtually nonexistent because of lightweight modular design and good OPP/duck typing practices, and a programming language with a rigid standardization process that never breaks old code