What you've missed is that they are still working without problems after nine years?
That's the definition of "quality".
To me, that's the definition of "you have been just lucky"
ok.
Last October I visited my 80 year old parents for a week. My dad complained that he'd wanted to find and send someone a photo from a trip they'd made some years ago, but it and several hundred others were missing (based on dates and camera photo sequence numbers). Could I figure out what had happened and "recover" them somehow.
I took a look at Photos on his new 16" MacBook Pro. Yup, missing.
Ok, let's look at your old machine. I grabbed his 2011 17" MBP off the shelf (same as mine -- I bought two of them used in 2014 and upgraded them with more RAM and an SSD). I booted it up, opened iPhoto .. the same photos were missing.
Ok, how about the previous machine? I grabbed the 2006 2.33 GHz Core 2 Duo 17" MBP off the shelf, booted it. Hmm .. seems to boot, but there's no display. Ok, let's try an external monitor. Yup .. and we're in ... open iPhoto .. and that photo range is also missing.
Ok, next.. I grabbed the 2001 "Pismo" 500 MHz G3 PowerBook off the shelf. Hmm .. it goes "boing", the screen comes on, but they it shows a Sad Mac. But it seems like the disk is spinning. OK. I plug a firewire 400 cable from the 2006 machine (with external monitor) to the G3, hold down the "T" key and start it. Bingo! Its disk shows up on the desktop of the MBP. I do "switch libraries" in iPhoto.
Turns out that range of photos is also missing from that machine -- but there are only about 100 more photos after the range. I think dad just lost or forgot to import one memory card from that trip and *never* had those photos on a computer.
Yeah, there were some things broken on those 15 to 20 year old machines. But they basically were working. Reinstalling the OS on the 2001 G3 might even get it going properly -- all the hardware seemed to work. Or at most a new hard disk.
Fundamentally, they are not being used now just because they are too slow, have too little RAM, and don't run current software.
I have a 1998 "Main Street" 266 MHz G3 PowerBook that still goes. I boot it up occasionally because it has *all* the old school I/O: SCSI not Firewire), ADB not USB. Well -- and just to see if it still works. It's running an early version of OS X and can communicate via ethernet and/or the WIFI PC card.