Well companies continue to get new software and learn new skills. They might not switch as soon as you suggest it, but it could get revisited later on when renewing a contract.

This also depends a lot on the size of the team and the work that’s being done. If required features are missing or there are compatibility issues, then that’s one thing. If people prefer the other product, or enough workers share similar views on the topic, then it’s easier to switch.

Again it doesn’t happen all the time, but it’s worth bringing up. If anything, it shows you’re thinking about how to improve your work and the business (financially, ethically). I’ve seen times when changes were made, and I’ve seen times when it wasn’t.

The support thing is a fair point, where companies would rather outsource risk than self host the thing. In that case it’s a matter of picking the most trustworthy company to outsource to. Best case scenario, the other company is doing things just as well as yours would have with the added benefit that they’re focussed on doing one thing well.