I think we can be quite confident that 2023 was the warmest year in the instrumental record despite El Nino coming on in the second half of the year and not reaching record strength. We have to keep in mind that ENSO is just one factor that affects globally averaged temperature. In addition to rising greenhouse gases, there are other human (decreases in anthropogenic aerosols) and natural factors that influence global temperature. We still need to figure out exactly what contributed to the record warmth in 2023, but the different datasets look pretty consistent.