LastOSLinux is based on Linux Mint which itself is based on Ubuntu, this means that if Ubuntu, Mint or LastOSLinux get updates, they'll be applied. The good part is even if LastOSLinux stops being available it'll continue to be up-gradable using the same methods as Linux Mint and will never be un-supported as long as Mint is about.
It uses a live OS that you can test on your hardware, restore timeshift backup images ot just do backups off a non bootable HDD. ...