So yes, just like we saw faucets die out, airdrops will also become completely meaningless and a waste of time in the near future. In fact, most of them are already useless.
Airdrops in the past were very different from the airdrops we know today; in airdrops in the past, you just sent your address to the developer, and they would send you their coins right away without you doing anything, compared to airdrops today, where you do tons of task before you receive a small portion of the coin or token and sometimes airdrops are raffled on who gets the most number of tasks delivered
That is because airdrops back then were in fact airdrops, basically free coins that you got simply by asking them, however the developers of today deceive people from the beginning by claiming there will be an airdrop, when in fact this is nothing more but a bounty.
Now I have nothing against bounties, but bounties are not airdrops, so not only you are not receiving free coins in order to test the network, but now you have to work so hard for them that I wonder why people do not do something else with their time, as they could easily get way more money if they dedicated those efforts to other endeavors.