A Greek saying goes: Ουδέν μονιμότερον του προσωρινού. (There is nothing more permanent than the temporary)

I keep thinking about it when building out information system architectures, especially ones that interface with end users. Bad design is metastatic and unbelievably hard to get out of. Whatever the cost of reversing a bad design decision you have in mind, 10x it and you still might not be truly there.