I was looking for a Linux Distribution with Linux Kernel 5.6 and came to know about ExTix Linux with a Tagline The Ultimate Linux System. It is based on Ubuntu 20.04 built with Custom Kernel 5.6.2-exton and has LXQt Desktop version 0.14.1. which is being touted as A lightweight, modular, blazing-fast and user-friendly desktop environment.
I downloaded the iso and copied it to USB and booted and I was impressed with its speed and low memory usage.
I decided to stick with it but wanted persistence since it came only with Firefox Browser.
I used mkusb on Ubuntu 18.04 to make another installation on the same USB drive but this time with persistence. It worked since the distribution is based on Ubuntu.
The distribution is very simplistic and has the grand old Synaptic Package Manager but I am familiar with it since I am using Linux for 15 years. I applied updates and installed libreoffice, gnucash, Solitair and Mahjongg which I require on daily basis.
I am happily running ExTiX Linux LXQt version with Linux 5.6.2 from USB persistence and may install it to hard disk later.
NB: mkusb makes usbdata partition which I am using to keep the gnucash and libreoffice files which can be used also on installed Endless OS and Ubuntu 18.04.