One company that I worked at sold expensive B2B products(real hardware with software). If a prospective client demanded a feature it was added to the sales and

One company that I worked at sold expensive B2B products(real hardware with software). If a prospective client demanded a feature it was added to the sales and product manuals immediately. However, it so often happened that a sale was made before a feature could be actually added as programmers were swamped. It was common to add a feature years after it actually appeared in the product manual. Call it vaporware or deception but it was not uncommon. Internally, company hated the practice but every other company was doing it. It also shows how quirky client demands could be if some feature could go missing for 2 years and no one would notice. I guess you could call it feature-on-demand-programming...