Yeah safety critical software needs to avoid high UI density for the interface itself. For diagnostics and monitoring or general stats you can still do high den

Yeah safety critical software needs to avoid high UI density for the interface itself. For diagnostics and monitoring or general stats you can still do high density but the actual "action space" needs to be kept as low density as possible and preferably with physical separation in the UI (i.e. via physical buttons and displays instead of just a big touch screen or monitor+Mouse and kbd). Higher information density is ideal but when people are working in less than ideal conditions (stress, lack of sleep, alarms going off, etc) you need to prioritise information clarity and clarity of actions over raw density.