I think it's just quite difficult to keep on top of all new information when there is limited resource in terms of time and people.
Glass also often takes a back seat compared to silver and china/pottery and paintings. I've no idea why because it seems to me the works of art in glass are many times more difficult to create than those in silver or china.
I went to the Musee des Art Decoratifs in Paris with a non-glassy friend recently. When I explained how some of the opalines were developed and also how some of the art nouveau pieces and pate de verre were made, she was suddenly completely intrigued by the complexity of the glass. She had assumed in her head that they were all just blown into a mold in some way, in different colours, so was about to walk on. Afterwards her comment was if the museum had actually written some of this information on how the pieces were made and placed it alongside the pieces on display, then she'd have been much more interested in reading about them and looking at them.
It's a crying shame when the complexity and history of these stunning pieces of glass art (whether handblown masterpieces or pressed glass rare objects ) is lost amongst the oil paintings and giant bits of silver. They're missing a trick in engaging a wider audience.