Lol, I’m one of the longtime scarf collectors and I haven’t noticed a change! For me the worst season was 1999 when the scarves had so much sizing they were stiff like cardboard and uncomfortable. I love the flowy feel of the last few years. The only silk I don’t like is the summer silk, but the winter silks, the twill lave, the carre wash, the new large triangles.....loooooove them. Overall, in the large scheme, over the last 20 years - really no big difference in quality.
There have always been minor issues and some seasons better than others. My CSGMs from the last two years were all better than the previous ten years’. I really haven’t noticed anything with the silks. Hmm!
But have you noticed how the Summer silk weight 140 has now spilled into the AW19.? I'm not buying it, literally. Many love the lighter weight though.
In order to get heavier twill we have to go right back. My Plumes is from 1950s and noticeably thicker than newer scarves (and looks like it was washed a million times) however, both the new Eyeliner weave 90s and the Wash are thicker than the reg twill. I can feel the extra warmth when wearing immediately and in the hand.
The pet hate I have most is the lack of colour on the reverse of some silks. My Samurai is kind of OK because it's pale cw but it put me off buying more. This isn't a recent issue as I have the same with a 2014 scarf but when I see any new scarves with this issue just no.