Consumer GNSS devices are developed a lot quicker than aviation GPS receivers due to high cost and strict certification requirements. So your 100 dollar drone

Consumer GNSS devices are developed a lot quicker than aviation GPS receivers due to high cost and strict certification requirements. So your 100 dollar drone very likely has a receiver with more features than a 100 million dollar airliner. And that drone is probably made recently, but airliners fly for 30 years.