Coronal temperature vs. X-ray luminosity for M dwarfs with eROSITA spectra (red circles), compared to FGKM stars from (Johnstone & Gudel 2015) (black circles) for which according to our updated analysis there are six M dwarfs (filled circles and individually labeled: 1 – AU Mic, 2 – EV Lac, 3 – AD Leo, 4 – YZ CMi, 5 – Prox Cen, and 6 – SCR 1845). Stars labeled low-mass (M_⋆ ≤ 0.65 M_⊙) in (Johnstone & Gudel 2015) but which have SpT K are marked with a cross. At the faint and cool end lies the planet-hosting M dwarf GJ 357 from (Modirrousta-Galian et al. 2020) (blue circle).