Text generation is fragile, error prone, does not play well with other type-based tooling, is difficult to upgrade, adds unnecessary busywork to the programmer'

Text generation is fragile, error prone, does not play well with other type-based tooling, is difficult to upgrade, adds unnecessary busywork to the programmer's day. When Java's limited, half-crippled version of generics showed up, sourcecode generation died. Pretty much overnight. Why doesn't anyone do it? Because it's a terrible experience compared to having types.