The downside of writing reusable, abstracted, DRY code for multiple applications to use: you have to remember to test changes in all the contexts... my org has to hire contractors project by project as we dont have the budget to have more devs than just 1 (me) on permanently. the contractors tho often don't know about all the places our code gets used. And sometimes I even forget - last week in the rush to finish some project, we forgot to think about how a library change made for benefit of a new project a few weeks ago might effect an older (in production) project. Until shit started breaking. Annoying. very annoying. luckily i fixed it (rolled back) before the weekend, but thursday and friday were quite stressful... now tomorrow, a bunch of sleuthing time to figure out exactly what recent change caused it... argh....