Yes, indeed, and in a sense more useful as a probe of the earliest eras in the history of the Universe, those that, from our usual point of view of the already classical CMB, are shielded by the last scattering surface.

It's quite a pity that later in the same 2023 year Starobinsky died. He had been suspiciously omitted during the Nobel Prize adjudgement in 2017, when the discovery of gravitational waves was recognized officially; and now this, the possible cornerstone in the observational proof, or at least check-up, of the inflationary cosmology he had contributed to.