Despite the "code does not rust", UI certainly does with respect to visual integration into modern applications. While an API may stay functional, if it says "gimme a Widget X" and what comes up is some ugly piece of crap that doesn't fit in with the rest of the UI, it's not meeting the programmer's expectations. I'd prefer a flashing 'warning' light, a phrase like 'virtually abandoned', etc. but I'd settle for 'older'. Something needs to be there.