The primary reason I stick to iptables instead of nft is that I already learned iptables decades ago, and some software I interact with still defaults to iptables and/or does not have full support for nft.
Why do you doubt the sanity of people sticking to iptables? What makes nft compelling?
There is iptables-nft, which is iptables with an NFT backend.
My main reason is that nft applies configs atomically. It also has very good tracing/debugging features for figuring out how and why things aren't working as expected.
That said, I think many distros are shipping `iptables` as the wrapper/compatibility layer over nft now anyways.