There are and there aren’t ways of doing that. At the end of the day, that reflection is essentially all there is to that material, bc it’s sure not doing any lighting calculations. You could replace it with a simple vectorParam base color if you really wanted to cull it down, but without that HDRI it would have essentially nothing even making it appear physical.
If the glass becomes visually opaque but it’s doing so via a shader trick, it isn’t saving perf. bc the shader is still calculating it as translucent from a shading sense. You could have a LOD chain where the upper lods have an opaque texture though.