Likely big, heavy, expensive commercial CNC machines.
So probably I should just start my hobby with a 5D+, 200000$+ cnc machine to be happy with 
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Odds are you’ll be pretty pleased with what you’ve built with your own hands.
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There are a lot of shortcuts you can make when you are building thousands, or hundreds of thousands. I imagine the machines at ikea are pretty interesting. I wouldn’t be surprised if they have a machine built for each piece of a desk.
Making a simpler shape is easier too. I bet anything that can be made on a lathe can be made on an industrial lathe in seconds.
You posted this link as an example of what you wanted to create with a CNC machine, so I was curious and poked around a little bit. I only have access to parts of the site you reference and I’m reading translated German, but I believe he created this bowl using this machine. Based on the components in the picture, this looks like a CNC in a class above what I consider a hobbyist machine. So in a class above machines like the Shapeoko, Longmill, X-Carve, and WorkBee…probably in the same class as the Stepcraft M-Series machines. So it is not a $20,000USD machine, but probably comparable to a machine in the $3,000USD to $5,000USD range.
Second, he uses log slices with an undulating edge as his stock and carves parallel to that edge. It creates a nice effect with the grain following the outer contour of the piece, but he had to first model that contour, and then he had to align and position the router with respect to that model. This is not a beginner task.
This is also a two-sided milling, and you can see from Jeff’s difficulty list, this is at the bottom (i.e. more difficult) of the list.
Also for as beefier as his CNC machine is over an MPCNC, he does not have a huge amount of height for his stock. A comment indicated that he has only 80mm, but looking at the bowl, it looks more like 100mm. So even this more capable machine has relatively short Z working height.