I don’t know what the big deal is about raw. Millions use jpg and are happy with it.
The Zeiss ZX1 has a 512GB fixed internal storage. While it would be faster storage than an SD card technically, I would not want something like a non user serviceable part like that in the camera. Also, I think the flexibility of being able to swap out cards for loss limitation and well, just flexibility outweigh the marginal performance benefits of internal storage.
All digital cameras do have a buffer though for burst shooting. I think the current expected norm is about 2GB. But this is not really for storing images at rest.
As for JPEG, if it works for you then that is cool. We all have our own path to walk. My problem is that I make a mess of exposure too often so having a RAW file is more versatile to my flow.
Here is a poor example where I have amplified it to show the reason. The dark frame is the basic exposure. As you see it is hideously underexposed Note: please ignore the copyright notice, I keep forgetting to turn the damn thing off.
You see if I was going for dark shadows it would tick that box. ha ha ha....
This next image is the JPEG with exposure lifted. If you look in the lower waterfall, there is very little in the way of shadow details. Also, in the water trail itself, you see some artefacts.
However, in this image - an export to JPEG of the raw, exposure lifted, you can see more detail in the shadows in the lower fall and also fewer artefacts.
Each to their own though, we all have our preferences. Personally, RAW provides a crutch for me when I am stupid/lazy with my camera.
Man, those colours and the clumping are hideous in the JPEG too.
Hopefully this makes sense.