I thought PCs were closer to $8000 in 1980s money. This is considably cheaper than I thought it was. My current PC cost more than $3800, thanks to out of control GPU pricing.
I think that's backwards - the turbo button (very unintuitively) actually slowed down the computer to allow backwards compatibility with older software and games!
A lot of games didn't work properly if turbo mode was engaged. They would run unplayably fast, have crazy game breaking visual glitches, or just crash. A few of my games had a splash screen reminding the user to turn off turbo mode. The turbo button was mainly there to speed up processing for mundane tasks like spreadsheets or for compiling code.
It was basically to downclock the CPU because old computer games were built to run off of the speed of the CPU. When processors got faster those games scaled up their speed too. Normally you’d leave turbo on all the time except when playing those games. You turned it off and it would restrict the clock speed on the CPU.
I got my first 1GB HDD in like 95 or 98 and thought I would never use close to that....fast forward to now and I'm filling up terra bytes for movies I watch maybe once a year and video games that sometimes I never even play.
oh yeah... 89/90... I remember, I wanted the 386 because 32bits and protected mode (windows 386 enhanced mode for the win!) so I bought something like your father but a 386/1MB/40MB and I upgraded to a VGA card and a 14" multisync VGA monitor (1024x768, at the time it was incredible). Cost of all this? $4000...
Saw that 45/HR labor charge (I work in IT and my going rate [for the company, not my pay] is a little above that. No wonder he said he'd do it himself, at those rates
$102 for an ega compatible graphics card in 1989 sounds like an absolute steal. So many computers had that terrible cga 4 color crap. Something that could output 16 color video was like having a 1080ti probably.