Darren Lebner
TVWBB All-Star
They're still holding up. When do they need to be changed? When pinholes start appearing or sooner? Are there stainless replacement bars? Burner knobs on the front, FYI.
When holes start appearing, it is time IMO. Sometimes the bottom edges get really ragged as well.
Yes, there are stainless versions available and highly recommended. Just make sure you get a set that is 16 gauge. Most are only 20 gauge but they will not last nearly as long. If you can get ones that are 304, that is best, but 430 and other stainless versions are still much better than the porcelain coated ones.