Best project Ive worked on, we went and implemented a scrict code standard, based on the code standard that a firm that contracted my team to do the work had.

Worked perfectly. Beautiful, maintainable code. Still used today without major reworks, doesnt need it. Front end got several major updates, but the back end uses what is now called microservice architecture, and we implemented it long before the phrase was common.

Got the opportunity to go back to it this year. Devs with the 2nd firm not only ignored all of the documentation we put out, they ignored their own coding standards document.