I have a bee in my bonnet about this one.
Conventional trekking poles evolved out of ski-poles, but they have a different function and simply don't work very well for walking.
The warning sign is that you need to resort to the artificial expedient of straps to actually hold on to the things. This can be inconvenient, uncomfortable and puts unnatural pressure on the joints.
A small UK company has produced what in my experience is an objectively better approach, with an ergonomic handle that channels the weight safely and comfortably to the root of the hand without any need for straps. It also encourages good technique by ensuring you hold the poles at the correct angle. I've used them extensively, and would never go back to a conventional pole. It's hands-down a more comfortable and efficient design (pun intended).
The industry showed no interest in a product that challenged their current offerings, so the inventor set up her own little business to produce them. The PacerPoles have a devoted following in the UK, where they are used by most of the best-known writers and reviewers such as Chris Townsend, but they are little known elsewhere.
Now the process has gone full circle and people are using the PacerPoles for skiing.
It's a very conservative market niche, and this is the only meaningful development I'm aware of in the field. But I would encourage people to think outside of the box and not to settle for an inherently flawed design.