I kind of agree with this conclusion. Before we know better it can be just that spacetime was expanding at a different rate (we still would need at least one a

I kind of agree with this conclusion. Before we know better it can be just that spacetime was expanding at a different rate (we still would need at least one another Planck that operates in roughly same range to confirm this). Hubble wavelenght range - 0.1 to 0.8 μm Webb wavelenght range - 0.6 to 28.3 μm Planck wavelenght range - 330 to 10000 μm My understanding is that Planck was observing photons that have happened much more earlier.