I was pretty skeptical about AI photo restoration at first as it usually makes faces look fake or weird or even adds details that were never there. However, I tried the online restorer https://old-photo-restoration.net/ just to see what it could do and I was pleasantly surprised: all it did was to clean up scratches and also it made the photo clearer without changing it too much. It's far from magic obviously but if you have old family pictures you'd like to repair, it's definitely worth trying.