Their incentive to stop is the same as Bitcoins. They're throwing money down the drain and don't have infinite money. You can argue they can't spam for as long on Bitcoin. In the same hypothetical situation Bitcoin fees would climb much faster and be much worse off and stay that way if it is sustained because it's blocksize doesnt adjust. Bcash has dynamic blocks now by the way.

Last part depends on rate of adoption, protocol improvements, and consumer tech advances. Just like we can easily run a Monero node at the current rate of adoption no problem. Bitcoin just gains easier validation at expense of higher transaction fees - which just centralizes in a different way (no one will run a node for a network they can't afford to use)

https://nostrcheck.me/media/af740d198babb8c7b82d0a4718eb354bb3f6af9a98639b85d4a5cf1371caba85/563fe6fae92d9f1459b7f4bc85978712a23a1b2c08bd389e681bad97f97a84e7.webp 

 The current rate of adoption of monero is a joke, I think it would react very bad if some adoption would come.
Bitcoin fees are still low and offchain solution are the way someone should pay, the tech is pretty ready.  

 Because no one is using Bitcoin as much. We see every time there is even modest increase in use Bitcoin fees blast off. If you expect everyone to be paying super cheap fees offchain, then how is that different from Monero in that regard? Miners will be making much less money in fees because users are not paying higher onchain fees (isnt that Bitcoins security model for when block rewards vanish is higher fees?)

Guess we'll have to wait and see what happens.

https://nostrcheck.me/media/af740d198babb8c7b82d0a4718eb354bb3f6af9a98639b85d4a5cf1371caba85/9f76e4c0f830601c97c152d2b5336ab3a18630c758d0a4ae48b454c08199af30.webp