x86 has and continues the brute force approach.
In the old days you had to think long and hard which platform you wanted, because of the low chance of software getting ported.
The only thing you have to think about now is whether you want to buy a locked down nanny you gadget or if you want an open one. There is a high chance cross platform software. Directx coming to Linux is a nice one.
Developers big and small make an effort to port there stuff to both Mac and Windows. On a smaller level also to an iphone.
If you want something bloated you can have Windows or Linux (lite versions yeah got it). It would not be an Amiga experience unless the OS is very lean or very easy to make lean.
My vote is for ARM because you could make it feel like an olde Amiga. x86 PC still seems like a frankenstein monster...You're forever configuring drivers or altering the bios whenever you plug something in or reinstall the OS.
I can only guess you was drunk while you typed this

DirectX for linux ? Huh? There's wine, but its not directx. You also seem to be confusing x86 for particular oses running on x86. As for cross platform development, the only thing that really needs to be considered is endianness, which doesnt often come up and is mostly dealt with by development tools and apis, and the apis themselves.
As for x86 using brute force, sure it can, but x86 is also quite elegant when it needs to be. In regards to ARM "feeling" more like amiga, that's like saying an orange "feels" more like a grapefruit in regards to the official fruit of argetina,.... completely nonsensical. AROS for example can run on various architectures, and not one "feels" different to the others, be it arm, ppc, x86 or x86-64. All feel *very* amiga like though. Additionally you can run big endian x86 code inside amiga os3.x inside amithlon and it does absolutely nothing to the feel besides improving speed.
Hopefully this doesnt seem too harsh, but your post really was a bunch of jibberish.