No, there always was an explicit warranty disclaimer and few, if any, distros offered continuous 10-year security updates constrained to a base version. Usually, you had to keep upgrading to keep getting security updates.
Source: spending my teenage years on installing various distros on my dad's computer, simultaneously pissing him off and ensuring I'd never have a girlfriend
Source: spending my teenage years on installing various distros on my dad's computer, simultaneously pissing him off and ensuring I'd never have a girlfriend