Okay...I guess I didn't realize you were being sarcastic in your remark. However, while I've said many times that I don't have problems with Win8, I've also demonstrated that some "expert" is totally wrong by showing that Win8 can do what he says it won't do. That wasn't an anecdote.
In regards to my system, I probably didn't HAVE to spend so much...but I chose to...and I had a specific reason to make that choice. I don't want to have to spend large amounts of money on upgrades for at least 5+ years. And I won't.
I have a motherboard that can accommodate 3 graphics cards, though I only use 2 cards at the moment. I have the ability to add another one in the future.
I have a 1200W power supply that provides more than enough power for my needs right now, so it will be up to the task of providing power if and when I add components.
I have 16GB's of Ram...but I only use half the slots available to me. Should I need more ram in the future, I'll have no problems plugging in more sticks.
I have a 256GB SSD, a 1TB internal hard drive and a 1TB portable drive. I won't be adding drives for a little while, at least.
My CPU is a hyperthreaded 6-core i7 processor. The software I use right now doesn't come near to stressing that CPU, but future software might. I'll be able to handle it with ease. Heck, right now I don't even have to overclock the thing...though I can.
I use a closed-loop water cooled system for the CPU. If I ever OC or use software that stresses my processor, the cooler will be up to the task.
I also have two 27" 1080p monitors...but I had those before I built this computer. They are more of a convenience than anything to do with being "future proof", but I have to say that I don't see myself going back to a single monitor ever again. I would love to add a 27" touchscreen monitor to my setup, but current prices make that an unwise move. But when I do add it, my graphics cards will certainly be up to the task of driving all three monitors.
Oh...and I use Win8...upgraded to Win8.1 Upgrade 1, so far. XP not supported anymore? I don't care. Win7 scheduled to end patch support in 2015 and security fix support in 2020? No problem. I'm good to go.
I really hate you now... gimmie that machine ffs!!