Speed is not the only benefit. The more we reuse components, the more they get complete and versatile. New features, when added to a component,
can be released with new versions of all application. This is the principle of reusability.
Reusability is the Holy Grail of software development. The principle is simple: reuse assets (programs, documentation, ...)
instead of writing and rewriting them again and again.
This is a reality in the software industry, thanks to modern engineering principles, methods and tools.
But custom development is an exception. Simply stated, it will hardly work for you.
Why not for me?
Because a reusable asset costs 4 to 10 times its non-reusable equivalent in terms of money and time. Yes, once reusable it can be employed
hundred of times, but this is not your case: you have a single need, and you are short on time. You need the software to run your business,
not the software as a form of business.
This is the reason why, despite millions of reusable libraries exist, they mostly address the tech domain (data, interface) instead of business needs.