And arguably, soaps available in shops are getting worse with every iteration. Enter a big store in most of the developed world, and you can hardly find a regular soap bar anymore (only liquids, "hydrating bars", etc.). Craft markets still have them luckily.

Many of those are likely detergents rather than soaps because it is less harsh on your skin and thus easier to market and sell.

I hate moisturizers and greasy bullshit or whatever else in soap though which is a lot of liquid soaps.

Detergent is more harsh on your skin than (real) soap.

Curious as to why you prefer regular soap bar over liquid soap?

With liquid soap I always feel like I can never fully remove it from my skin, no matter how long I rinse it with water afterwards. With a soap bar my hands just feel cleaner, less greasy. They also last longer and are easier to store/transport, need less packaging, etc. Also basic soap bars have two or three main ingredients whose effects are fully understood and have been used for centuries if not millenia. The list of components of the latest liquid soaps is far more obscure, no-one knows their long-term effects on us and the environment.

Reminds me of Jonathan Blow's observation that knowledge doesn't necessarily make it to the next generation and progress is sometimes lost.

https://youtu.be/pW-SOdj4Kkk

I hope you see you’re making my point. Soap without the hygiene practices isn’t soap with hygiene practices. And those practices are predicated on a theory of germs