I'm perfectly happy with my 800mhz Sam, it much more than 060, Workbench is fast, wb surfing is flawless, I can watch my favorite tv series with it etc. So CPU power is more than OK for me.
Flex would be at least 200€ cheaper without those "industrial" features. Talking about x1000 is different thing, it designed with different way, to offer max CPU power for Amiga and money is not a issue.
ACube might make Amiga only mobo, if there would be enough demand to it. I would say that it is possible to make and sell Flex level mobo about 100€, IF it has only needed features. Just 3x PCI, 2-4 USB, and CPU.
I am thinking honestly here that the physical manufacturing of hardware and selling them for even cheap price is not the issue here. It is the software that makes the computer run, when we lack in this area the demand for the hardware decreases unfathomably rendering the prices to go up, manufacturing hardware to be slow and hard to find and it end up nothing more than a hobby for the rich or the insane.
Why is it worth it for me to spend 600 bucks in a classic Amiga than say 800 bucks in a modern AmigaOS 4.x? Well because it is fun squeezing and making the classic Amiga do things it was not intended to do...but also because it's software library exceed that of OS 4.x and it is native and for it! AmigaOS 4.x software library are imports that can be done with Linux for free!
To me..the only time I think it is worth getting an overprice, super expensive, no longer used PPC hardware to run AmigaOS 4.x when AmigaOS 4.x have equivalent amount of software library as Linux and should we say almost 98% the same. Then to me I would rather own an AmigaOS 4.x and then perhaps..other companies may consider AmigaOS 4.x as a suitable business OS due to the user friendliness, lack of viruses, blah, blah that even Ubunutu unfortunately still lacks on.