We’ve all heard the old bromide, ‘if it ain’t broke, don’t fix it’. Besides be a grammar nightmare, the fundamental reality is that the advice is not actually bad. If you have something working, there is little reason to tinker with it, and certainly there is no reason to abandon it, altogether.
Well, there is also the opposite and equally true proposition that continuing to do something that isn’t working isn’t such a hot idea. There are sometimes when things look sound on paper; but the execution flat out fails. More often than not, plans and methods don’t completely crash and burn, though.