I think it's more that they don't, not can't, which makes it even worse imo haha. The legatos in their recent offerings I've bought like Studio Strings Pro have been terrible, but at the same time, Chamber Strings have some of the best legato offerings out there, so they're definitely capable, they just don't do it anymore. I would find their stuff much more useful with less mics and more dynamic layers, short variations and detailed legato transitions. I think the disregard for basic short consistency is even worse than the subpar legatos of late. Even AR1 for example:
Strings: Spiccato
Trumpets: Staccatissimo, Marcato, Tenuto
Horns: Staccatissimo, Marcato, Tenuto
Low Brass: Staccatissimo, Marcato, Tenuto
High Woods: Staccatissimo, Marcato, Tenuto
Low Woods: Staccatissimo, Marcato
I really don't understand this kind of thing, makes no sense the strings not having marc or tenuto, and low woods not having tenuto, to complete a consistent palette in a library that only has like 5 - 7 articulations per section 0_o