GL and Vulkan at the same time

[leiserfg]

Is there a way of exposing both APIs at the same time? There are apps that are able to change from one backend to the other (games manly but also some other 3d dev apps). Also, I'm thinking of wrapping my app launcher (or maybe even my Xsession so all the apps get GL and Vulkan if they need it but as far as I understand, with the current approach one has to pick one or the other.