With unprecedented supply chain challenges resulting in delays in aircraft deliveries, has the time come where airlines are forced to reconsider their long-term fleet strategy? What considerations are influencing their decisions on fleet expansion, fleet modernization or retrofit investments? How can airlines ensure they are investing wisely in their fleets? What metrics or indicators are being used to gauge when to invest in something like fleet modernization and if spending is on target or if adjustments are needed? How are airlines assessing the return on investment for fleet investments, especially in the context of retrofits and modernization? Which fleets are receiving the most attention for cabin refreshes or retrofits? What parts of the cabin are receiving the most attention in terms of retrofits? What challenges are these new cabins presenting during the retrofit and after the aircraft has returned in-service?