Not much has changed. You'll notice the expansion bus has a different number of contacts and probably fewer bus connectors because more things are built-in on the motherboard, even a GPU is on most boards today. With your past experience, you'll easily find way around this new equipment and building this new machine. As a corollary, in December, I ordered a new computer from Dell for my own office. I usually buy scientific workstations because I have some huge spreadsheets (over 500,000 cells for some) for my utility clients due to load values they want graphed and/or analyzed and I can't wait many minutes for the calculations to ripple through. Also, I use perhaps, 40 or 50 apps and it can take me days to move from my old computer to my new one because of having to install each app, deactivate on the old machine and activate on the new, deal with the problems some of them cause on the new machine, etc., etc. So, by buying powerful computers with lots of RAM, they keep me going for about 10 years on one of those machines and I avoid more frequent transitions. My last was a dual XEON (4 cores each) with 16GB of RAM. But as I compared the specs of current XEON machines with I7 and I9 machines, I couldn't believe that the XEONS were usually slower (lower clock speeds and no turbo), but with many more cores (up to 32). Lots of cores are great for parallel process applications, such as transaction processing, but do nothing for apps that require the completion of one calculation for which the output is the input of the next calculation - that requires FAST processors. So I bought a fast gaming machine that included a superfast GPU and then got a big (for me, 34 inches/86cm) gaming monitor - I love this new machine! I also get to play some drone combat games online and this computer is perfect for that (though the top scorers are making a mess of me, but I never give up). Interestingly, I usually play in the European sector rather than America, because here, they prefer to race rather than combat. Regardless, the key point that has surprised me is that this gaming machine is faster for me than the XEON chips and that has come as a big surprise. They have warehouses all around each country. I get most things in a day lately, 2 days at most as long as the product is coming from Amazon. But if it's shipped directly from the business selling on Amazon, it can take longer.