This is what happens when a single player (CDK Global) has massive market share (90% when measured by number of vehicles sold [0] --- EDIT: this is actually the combined market share of CDK + Reynolds, who have a non-compete agreement ---). The entire industry becomes fragile to product issues and/or malicious attacks. Anti-trust is important. [0] https://casetext.com/case/loop-llc-v-cdk-global-llc-in-re-de...
Why patch things or work your ass off, when none of your customers have an alternative? (especially if PE buys the business or CEOs get a stock price focus and gut engineering to keep-the-lights-on levels)