Apple propaganda notwithstanding, the reason tower PCs are big isn’t because they’re outdated. The reason tower PCs are so bulky is because they’re designed to be user serviceable. The case has lots of open space so your big, meaty hands can easily access all of the components, and everything is secured with friction-fit tabs and standard machine screws to minimise the need for specialised tools. A properly laid out tower PC is fully serviceable with a single Phillips-head screwdriver and no greater manual skill than your average Lego playset – heck, for some of the more modern case layouts you don’t even need the screwdriver, unless you’re performing major surgery like a full motherboard replacement.
Like, think about who benefits from convincing you that a fully modular computing device that can be serviced and repaired with your bare hands and minimal technical skill is unfashionable.
I pray the manufacturers will never take away my ability to KA-KLUNK a new PC part into the massive case, then plugging the thick power strips into each other like I am doctor Frankenstein puling my kreatur to greatness*
*‘greatness’ defined as playing minecraft without frame lag