Just noticed I've never heard them discussed here. Surly basically invented them and called them the Corner Bars, but given it's "bits of metal pipes" you can get some without the name branding now. They're supposed to give you like a drop bar-esque experience except without changing out all the controls and most likely drivetrain, so if you ever wanted to try one, maybe this is interesting for you. You might have to readjust some cables or hydraulic lines.
I post this here because I feel like "how do I convert my flat bar into a drop bar" is a very common question in the bicycle world and while it is possible, it is often sort of not very advisable unless you like wrenching on your bike
I haven't tried this style of bars, but I'd like to give them a try.
I'm a fan of 'crazy bars' that are sort of a similar idea. They're slightly swept flat bars with bullhorn 'hoods'. The design provides many options for adjusting posture to fit different situations of surface/climbing/descending etc. And they often can fit standard flat bar controls, and some even can fit dropbar controls on the bullhorns as well.
VeloOrange made the first version (and a new updated version), but Koga also makes a similar style (called 'Denham') that has been ergonomically tuned for touring. You can also fashion a similar setup with bolt-on bar ends (sometimes called inner bar ends) on almost any wide flat bars. SQlabs makes these ergo ones (https://sqlab-usa.com/collections/innerbarends), but there's lots of cheaper options too.
This article covers the design details of the Koga Denham bars in the context of all-road touring: https://www.cyclingabout.com/koga-denham-bars/