[raisin_churn]

The problem is "oh, we're still supporting it, we just released an update yesterday that fixed an issue with kerning when selecting certain fonts on the built-in LCD. What do you mean 12 critical CVEs unpatched for years?" So now you have to define "supported," which will be lobbied to death by every vendor in the world.

[riskable]

Well, if the company is willing to live with the risks/liability of a still-supported product containing unfixed vulnerabilities then they're clearly not long for this world. Eventually someone will sue--no matter what the support agreement/TOS states--and they will win. Even if they don't it'll still be a pointless large expense for the business.