  Recently published data on the Sachs electric form factor by the PRad
collaboration (Nature {\bf 575}, 147-151) are analyzed to investigate their
consistency with the known proton charge radius from muonic and electronic
hydrogen spectroscopy, as well as theoretical predictions from dispersively
improved chiral perturbation theory. It is shown that the latter is fully
consistent with the data, and pointers are given how future $e-p$ scattering
experiments can lead to an improvement of our knowledge of the form factor in
the low-momentum-transfer regime.
