Not on Macbook Airs that are only 3-5 years old though. We have a number that we plan on replacing after EOY, but we are still using for now. Can't get Sequoia.
Absolutely not. Apple was still selling non-Retina Intel MacBook Airs until 2019. Those are now completely unsupported with no security updates having topped out at Monterrey. 5 years of updates on a new laptop is borderline criminal.