Mass accretion rates as a function of stellar mass. Red diamonds are Class II YSOs in Chamaeleon I, Lupus, and L1688 from Testi et al. (2022), and in Taurus from Gangi et al. (2022). Blue points are large-scale infall rates of star particles from the MHD simulation (see Section 2.1) with local gas density lower than 5 × 10⁴ cm⁻³. The dashed and dotted black lines are the expected chromospheric noise levels (Manara et al. 2013, 2017) using the 3 Myr isochrones of Baraffe et al. (2015) and Feiden (2016), respectively.