Segwit destruction will snowball.  One miner will figure out it is more profitable to skip verifying signatures.  Then two and three figure it out.  Then those who don't skip verifying signatures will notice their relative reward rate dropping.  Then someone will publish new bitcoin code that makes it more profitable to mine (by not verifying signatures).  The less people verify, then the less risk that skipping sig verification would result in the block getting rejected by the network.   Then more and more will join the bandwagon until those who verify signatures are a minority and at that point bitcoin gets majorly attacked and starts collapsing.