Given it’s an old version, we can’t give any support whatsoever with bugs or even certainty that it’ll keep working in the future. Maybe there are alternative clients supporting Android 4.2 as well, but I don’t know any from the top of my head. You may also want to make sure to enable F-Droid Archive in the repositories screen, given for most apps only old versions of the apps will still support Android 4.2.
I haven’t had much luck with the fdroid app itself on these older androids though. Despite being possible to install and launch, the older versions give me lots of crashes, hangs, slowdowns, nonsensical search results etc and it is so much easier to just use a browser.
In my opinion, the f-droid.org page should offer the option to download old versions.
Offering always a link to old version and/or trying to detect the phone OS from useragent and offering a compatible version to user.
F-droid contains many useful apps, that can enable the usage of old devices for decades.
Keeping it working in an easy way doesn’t require a big effort from the f-droid community.
So, why so much focus in the last version of the client and apps for modern devices?
Not user friendly, it requires previous knowledge about this.
I am sure that there alternatives to enhance the UX
Even modern devices are used to be unmaintained after few months.
These old devices only are vulnerable if they are online. I don’t think that many people are using these devices as a daily driver and even if they are still doing maybe better that they use opensource.
I think that these old devices are great for offline usage mediaplayers, offline gps tracking, dictionaries,…
At the moment, the current process to find compatible version and download requires more than “basics” skills.
I had many phones, some from big brands, most of them had a single update in the 1st year but not anymore including 1st brands, just a high specs samsung had updates during around for 4 years.
For most people SIM goes on the daily driver device but not on additional devices.
Daily driver usually is quite modern device with a recent whatsapp, bank app or a webbrowser compatible with modern pages.
It is use case, most people has old tablets or phones that can still be used for many tasks, games for kids, ebook reader,…
Also I just realize about another use case, Jolla C has a updated OS but it is compatible with android apps through the execution of an android runtime (below v5)