What is impressive is how well the IS sells for being 15 year old and compared to other sedans. That Lexus did not redesign the car is beyond understanding.
To take it further it’s admirable as the IS was never a volume sedan seller. The ES was and continues to do so.
ES-39k and its older
IS-22k and it’s a heavy refresh
In comparison
16k TLX which is a merge of TSX and TL, We are talking a combined 80-90k units in its heyday. What a disaster
13k G70.
6k Q50 is is literally a decade old like the IS but without the heavy refresh. We can argue it aged well. G35/37 sold very well for the brand I think 40-50k range in its heyday (including coupe).
What we have is Lexus figured how to have two sedans at the same price and others can’t figure one out.