I think its still better to have some competition between a few private airlines (even if de facto subsidized by gov't) as opposed to one behemoth national airline that faces no competition and therefore has no incentive to innovate.
https://www.singaporeair.com/ https://www.qatarairways.com/ https://www.koreanair.com/ https://www.jal.com/ https://www.malaysiaairlines.com/