Since I am new and have followed the advice of Glide Experts I feel their pain.
In this June 2021 post Glide asked the experts how they used CSS and I would expect with an expectation that when CSS went away many of the features called out from this post might have been integrated.
This awesome community has now created another list (my small requests are for tables and sticky components) of features they need to support APPS already built.
I hope Glide is rapidly responding to the Glide Experts on what can and can not be done with CSS in the new DOM model.