I can't believe how often pieces are dropped and broken at shows that require art to be accepted & dropped off & picked up. We have done emergency repairs for organizations who have accidents in handling, hanging etc.
Maybe requiring acrylic reduces their problems with that.
I have a very small number of clients who will only use UV filtering acrylic because of a combination of art value and infrequent need to ship framed pieces. One in particular does it to reduce risk of art damage.
I have been stunned by the frequent and large increases in acrylic prices in recent years - cost is significantly higher than basic UV filtering conservation glass (for example, TruVue Conservation Clear).
There used to be a miniscule advantage to UVF acrylic (filtering starts at 400 nm and shorter, claimed minimum 98% UVF), whereas UVF glass used to claim minimum 97% filtering and blocking wavelengths 380 nm and shorter).
I see the glass people are claiming 98% minimum now. I don't know if there is a technical improvement or a marketing scheme. (Haven't investigated).
If you want UV filtering glass with anti-reflection coating (more like eyeglass coating, not referring to etched 'non-glare' type), the price goes up alot, but it's still more economical than UVF AR acrylic (Optium for example).