What was the actual risk of using SpringBoot tho?
If there's no money in it for them - reduction of staff or funding leading to slower releases and bugfixes
Moving some features like Spring Cloud / Spring Integration, or new development behind a paywall (think RHEL)
Big users (like Netflix, Walmart, JPMorgan, LinkedIn/Microsoft, etc) would likely be able to pay for it (until they moved off), but smaller companies and individual developers not so much
Spring is so widely used that there are multiple "large enough" companies who could do this