I have 4 HDFC cards, all LTF.
1. Business Regalia #1
2. Business Regalia #2
3. Swiggy
4. Tata Neu Infinity
Got an offer to upgrade one of the Business Regalia CCs to BizBlack (10k) but I didn't take it. And then to upgrade to BizPower (2.5k) but I didn't take that also.
As of now, no offer to upgrade.