We do! It takes time because new cryptographic schemes takes a while to be standardized and implemented. i.e. MuSig2 itself was just merged into libsecp256k1 three months ago.

https://primal.net/e/note1lw30vds9um9j3p6qp8fmds67ay9tmu2r0qkta3v3zfas5ljadgvswnm06e