Statistics of the planets with spin–orbit angle and atmospheric measurements; see the text for more details. (Top) We show how many planets with JWST and HST measurements have their spin–orbit angle measured. We show the same for Ariel Mission Candidate Sample (MCS) and Ariel Tier 3 candidates. While only 41% of HST/JWST atmospheric targets and 29% of the full Ariel sample have measured spin–orbit angles, the Ariel Tier 3 sample achieves 70% completeness. (Bottom) The total sample of planets with their spin–orbit angle measured shows 62% aligned, 30% misaligned, and 8% intermediate cases. This is consistent with their distributions in the JWST/HST atmospheric sample and also Ariel Tier 3 candidate list revealing no biases toward either population.