The bit to "learn every day" is to avoid proprietary computers like 'Dell' like the plague.
They invariably build to their own standards of 'scale', never have appropriate expansion or PSU capacity for anything other than basic computing...think 'typewriter'.
The 'generic PC' was always superior to other systems [eg Apple] as they allowed D.I.Y. and created standards for motherboards and cases etc, so 'mostly' you never had compatibility issues or problems with space...eg...a Case with an ATX form factor would always fit an ATX board ....the PSU location allowed for bigger PSUs when required and only OTT graphic cards might not fit due to massive length, but generally most do.
Pretty much the best thing you can do with a Dell is get a second one...and you'll have matching bookends...
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