While Brotli tries to use all those transforms, I guess it is still not exhaustive enough to fully make use of them, given that Brotli (and many others) is asym

While Brotli tries to use all those transforms, I guess it is still not exhaustive enough to fully make use of them, given that Brotli (and many others) is asymmetric in design and compressors can be heavily tweaked without affecting decompression too much.