In fact I see that byzantium is commonly based on bullseye (oldstable), so a lot of packages have really old versions. From the other hand, it is official repo which will get the system updates first. A few weeks ago I was excited to rebuild a couple of packages that are the most important for me, namely snapd (default just not work), geary (due to UI bugs), epiphany (as many websites reports about obsolete browser but I’d like to use web apps)…
However, the task turned out to be much more difficult than expected and today I have about 260 packages in my local “repository” to be updated simultaneously and some new problem caused by really low GLES version supported by L5… I understand that automatic future updates would be broken but I’d really like to start using my L5 as a universal tool for calls, messages, emails, develop, writing, web and so on!
I do not know if anyone is interested in my experience and how to share it better. I just like to say that it seems to be possible to organize some backports repository for the most important apps.