Sorry for thread hijack, feel free to continue original chat..
Rant below to reply (in agreement), cuz I've been monitoring this since my time at Kettering back in 2001 (GM engineering school in Flint) and tinkering with 3800's from their birthplace there since 2002-3.
The larger vehicles always surge while gas prices are decent, and we've been back at $2.xx/gal for a while (the 2008 market crash causing it to get ~$4/gal shifted things the other way... people have goldfish memories when spending tens of thousands, unfortunately). GM is always behind the wave chasing sales trends (sport compacts, affordable V8 RWD cars & releasing their retro pony car, and other things you can probably review).
I've never bought new, and now in a position where I could, they have continued to prove they won't be my 1st choice despite my fandom/experience with mostly GM things for ~30yrs since being able to recognize brands as a kid. Heck, my mother just got a new Chevy crossover and it's already coming out of a little 3yr warranty, so even GM doesn't stand behind their prone-to-fail products. The 3800 was too simple, solid, and could be upkept/improved with minor tweaks, so it had to die (see Grand National and now LS's). The 3.6 and new LT direct-injection engines are good overall successors as technology will always have to move forward, but the complex nightmares of maintenance and pricey/narrow upgrading paths will deter modification for all but those who aren't as invested beyond surface-level. I know I could figure out how to tinker with them, and may do it someday (already digging into my EcoBoost 3.5L truck's similar tech), but most will go back to the consumer-level of buy/sell/repeat & appearance mods will again rule the day.