Yeah, even if you have the attribute to give food on them, you're talking about maybe 3 food and 3-5 production for most of them? I mean, they're not terrible, if I have space for them. But if you're at all limited in tiles for your cities, it's not worth it. The good part is that when you're that late in the game, if you have a handful of gold tiles around, often you can pop them down for like 150 gold or less. And sometimes it can be worth it to use them just to kick a rural tile out and have a new specialist you can place.