Whilst I appreciate your opinion but my question was directed to the plugin authors.
And as I've said - what about security/plugin vulnerabilities/bug fixes?
Not asking developers to work for free forever (I used to be a developer btw.) - but this is what I consider after sales service so customers can consider purchasing other plugins from you in future. All the plugins I've ever purchased on the Envato Marketplace offer lifetime updates, just not lifetime support.
Even if this concern is not addressed, I'd really appreciate a reply or at least someone taking a customer's feedback into consideration as I'm sure other customers would have the same concerns too.