OK so this is pretty cool!

A brave soul was cool enough to test the LSI snap on +Ubuntu with latest snapd to determine whats left to enable over there: https://github.com/solus-project/linux-steam-integration/issues/35

After some minor alterations to LSI, the only thing left to do on that front it would seem is to now enable snapd on multiarch to expose 32-bit NVIDIA drivers. As can be seen from the screenshot, it already works on the open source drivers well enough :) (Vulkan also works for the open source drivers, we just need to make multiarch and biarch behave the same and expose the vulkan ICD file to LSI)