If my original 9.7-inch iPad Pro that I purchased back in 2016 is still going strong and can handle all of things I do with it with ease then those who have had their mind set on getting the 2019 iPad Air should go ahead and do so, in my opinion.
The iPad Air 3 from 2019, would still be a great buy for anyone who wants to buy it. It has the more powerful A12 processor. The the iPad 7th Gen. also from 2019, has the A10. In fact, the iPad Pro 2020 has an A12z processor.