I don't understand the comment about the LaCrosse being "unwelcome". It sold well enough to stay in Buick's North American lineup for almost 15 years and it's still being produced and sold in China (more's the pity for North America, IMO); in fact, Buick's popularity in Asia is the only reason the brand still exists at all. That said, the first generation (W-body) and second generation (Epsilon extended) LaCrosse are entirely different vehicles that really occupied different niches in the Buick lineup. The W-body version, as a direct replacement for the W-body Century/Regal that preceded it and like them, the 2006-2009 LaCrosse was a mid-range car with minimal frills, targeted toward value minded buyers. It occupied a similar place as its stablemates, the
Pontiac Gran Prix and Chevy Impala, thus comparing it with past flagship GM vehicles like the Park Avenue and the Aurora is a bit unrealistic. The Epsilon (2010-later) LaCrosse moved up-market to also replace the Lucerne and thus occupied the executive/full size slot in the lineup and was given more premium features, as befitting its new status. Having owned two Auroras, a '95 and a '98, and a '97
Cadillac Deville Concours, I can say that my 2013 LaCrosse compares favorably with those vehicles, even if I once got lambasted on the ACNA forums for having the gall to suggest that the Aurora, had it continued in production into the 2010s, might well have been based on the Epsilon extended platform along with the LaCrosse, the Impala and the Cadilac XTS.