Violin plot showing the median AGN variability timescale (τ) estimated from M10 over the SDSS bands as a function of redshift. The dashed black line represents one-third of the SDSS baseline duration, showing the redshift-dependent threshold beyond which the condition 3τ < baseline is no longer satisfied. This requirement defines the redshift range over which VAR-PZ can constrain redshifts with the current data. The red and purple line represent one-third of the 5 and 10 year LSST baseline, respectively. LSST’s enhanced sensitivity will enable the detection of fainter objects, resulting in lower overall timescale values (τ) and consequently providing greater constraining power.