That has been my experience as well. I’ve had teachers who claim to feel it. In one case it was described as a feeling of energy sloshing around inside the body, like taking a shower on the inside. I’ve never felt anything even remotely like that. I trained taiji for over a decade. It was always second place to other things I was training and perhaps my lack of understanding is a result of not giving it the attention and work that it needed, although I was regular in my practice. Ultimately I decided that I don’t understand it, I am unlikely to understand it, and other things I was training made more sense to me and were a better match for me. So I stopped training taiji. I don’t think much (or at all) about Qi. The Tibetan White Crane that I study has a systematic method of training full-body connection that makes a tremendous amount of sense to me. We don’t talk about Qi or anything that might be interpreted as mystical. It develops a powerful and efficient technique delivery that I feel is second to none, but I also recognize that it is not a good match for everyone. No single method is the universal best choice for everyone. People need to find a system that they can connect with and makes sense to them in its approach to training. Different systems with different approaches will appeal to different people. Maybe that’s as close to qi as we can get.