We bought a duct tape software to run our internet business. The sellers said (and I quote) "We don't use industry best practices." Not proudly but matter-of-factly.
The up side is that the thing is the right price. $1.5k vs $50k.
The down side is that it is spaghetti code, uses global data to pass information around, is not object oriented, doesn't use unit-of-work database transactions and gives error messages all day long. We manage to survive because we have somebody who is tech savy, me, but it is the source for plenty of aggravation but probably less than $48.5K worth of aggravation.
Amazingly we have not lost any significant amount of data.
With all the fancy scientists in the world, why can't they just once build a nuclear balm?