Heh, realized very late that the 3rd gen gaming build's system drive specs had the wrong drive listed as System, as it's an Intel 7600p PCIe 3.0 x4 NVME SSD and NOT the retired 1TB Western Digital WD10EALS HDD as it was in the 2nd gen build. Fixed in previous post.
Anyway... For curiosity's sake, I decided to take a closer look at the 2nd generation gaming build's hard drives' S.M.A.R.T. attributes. The build pretty much runs 24/7; this is reflected with those drives' stats.
The original dual-boot OS drive, which was my original storage drive... the WDC WD10EALS. Pretty high hour count (still doesn't beat my Seagate 40GB PATA drive in such, though).
And then, the Steam Games drive, which was Mom's previous laptop drive... the WDC WD10SPCX. Mind you, this was originally a proposed Downloads drive for the 3rd Gen gaming build (which, frankly, I'm glad I decided against doing so). The pending sectors event happened AFTER the migration. Strange luck.
Site update: cwcyrix.duckdns.org -> cwcyrix.nsupdate.info due to the former no longer working.