There are several downsides to the Dell.
The upgrade path is probably limited. It can't be overclocked - the proprietary Dell bios is locked down and stripped. It will have very limited features and all components are cheapest of cheap you can find.
I have almost never upgraded a computer. By the time it needs upgrading, I have always wanted to upgrade pretty much everything (cpu, memory, bus speed, slot types, new connector types, etc.) and so just got a new system (at $500) and used the several-years-older one (now worth maybe $100) as a media machine or gave it away to friends or relatives. Upgradability isn't bad, but it does come at a price. It depends if that price is worth it. I wouldn't spend an extra $100 for upgradability on a system that costs $500.
For about the same money you can do a home build that has actual quality off the shelf components with no Dell bloatware preinstalled.
Can you put together a list of the following that adds up to $530 or less?
motherboard
i5-4460
8GB Dual Channel DDR3 1600MHz
1 TB 7200 rpm HD
300 W PSU
case
keyboard
mouse
Windows 8.1
DVD+/-RW drive
As for quality, I bought my first Dell when it was called "PC's Limited" in 1985. I (or my company) have bought hundreds of Dells over the subsequent 30 years, some for home use and most for business use running 24 hours a day, and some of them running mission-critical equipment 24 hours a day where even one hang or failure of the computer results in the loss of up to $35,000 of product. Not only are those computers run for 24 hours a day, but they are run that way for, in some cases, more than 5 years that way without any replacements. Out of those thousands of computer-years of Dell use, I have had so few failures that I can only recall about five machines failing. There might be more than that, but they are just so rare that it is almost nothing.
Can you buy a better keyboard or mouse, or a case that costs you more money? Sure. Does it add reliability? Apparently not.
You're going to spend half a day just removing all the Dell junk off that computer.
A wild exaggeration in two ways. You don't need to remove much of anything at all, and if you choose to do so, pressing an "uninstall" button isn't much effort.
I understand that you prefer "build it yourself" machines. There is nothing wrong with that. I will likely have my daughters do that when they are old enough. But you wildly misrepresent Dells. I am giving you (and have given you before) information and statistics from thousands of machine-years of use of Dells spanning decades. That data is statistically very solid.
