I believe the same will happen with Ordinals in the long run. The higher the rate of NFTs inscriptions, the higher the fees will be. Once that happens, there will be a decline in NFT inscriptions, paving the way for normal users to perform transactions at a lower cost. BTC is strong and resilient, so there should be nothing to worry about. Just my thoughts 
This seems to be the most popular assumption so far although it sounds wrong. As I've said before this type of attack (unlike the previous forms) creates an incentive to spam so the attackers may not care about the cost while regular users sending bitcoin around do. That incentive is the scam market that is being built around the Ordinals Attack.The logic is similar to the withdrawal fee people pay exchanges. Normally you'd say 50k-100k satoshi fee for a bitcoin transaction is outrageously high and yet you'd pay it to withdraw your coins from the exchange simply because there is an incentive to send your coins there in first place (profit from trading) hence that amount doesn't seem that high.