Yup.
That's the rabbit hole of retro computing. The parts are all relatively inexpensive to build the nostalgia machine from your youth (or any other significant age bracket), and we all remember the thrill of getting your hands on that important upgrade which will improve your frag count.
On a deeper level, why am I building "the ultimate" dual xeon 604 system? Not because I need it, not because I don't have enough pc's, but because it's the sort of escapism that's fairly harmless (unlike other habits to relieve stress).
Tinkering with old stuff takes my mind off of other things less enjoyable. It's rewarding to see something that you've built yourself (the LEGO-effect people now have been noticing). Once the build is done, there's still stuff to improve OR you can just build another one.
It's not the sort of hobby that will fill in gaps in your life, be very enlightning (or improve your health), so I'd recommend exercise, a good social network and a balanced diet to go along with retrocomputing.