Upgrading to 3BHK: Infra projects ki premium worth it?

Visited Puravankara's project near Sarjapur Road last weekend, and prices for a 3BHK already seem quite high, almost ₹1.6 Cr. I'm currently in a 2BHK in RT Nagar, thinking of upgrading, but not sure if this price jump is justified. Metro Phase 3 aur Peripheral Ring Road ka kaam chal raha hai idhar, toh kya lagta hai, will these areas like Sarjapur or even Yelahanka see huge appreciation? Builder bol rahe hain ki ROI tagda hoga. But yaar, these infra projects ki timeline ka kya? Kitna delay hota hai pata nahi. Is it still worth buying properties near these upcoming corridors ya sab kuch already priced in hai? Any advice on finding something affordable but with good potential? Kya lagta hai community ko?