Good riddance- with any luck the post COVID-19 world will be one with less reliance on air travel for the atmosphere's sake. Especially in the numbers that once made airplane designers believe the 747 and A380 could be economically viable.
Regardless of the plane size however, there's no getting around planes depositing pollution in the upper atmosphere is worse than we thought and cannot be thought of in the same way as emissions from a train or power plant: https://www.newscientist.com/article/2207886-it-turns-out-pl...