. . to replace bash with another shell of your choice? 30 seconds? 45 seconds?

Even if you did have another suitable Bourne-compatible shell, would it really take you just 45 seconds to retest all those scripts? Just 45 seconds to figure out which ones relied on Bash-specific extensions and port them over to the new shell? What if some lawyers were demanding that you ship a version of your Linux package without a shell? Would it still take you just 45 seconds to respin a fully configured, tested, and working product? What if the component you were being forced to remove did not have any readily available workalikes?