I haven’t been paying attention on the rolling releases scene, but I’m pretty sure there was no mature option back when I installed that thing in 2019 or so other than Debian Sid (and daily driving that used to be an adventure in itself, but it’s been years since I last had a system like that). With ubuntu since at least version 14 upgrading from stable release to another was pretty stable experience, but that’s not the experience I’m having today.