Because it uses obsolete software components. Binary compatibility with Fedora 31 or CentOS - for both of which the support is ceased - is a good measure of how old SFOS is. The same story about ASOP which currently is aligned with Android 13 but SFOS uses 10 because AlienDavik Android Support cannot support newer ones. Despite this AlienDalvik works pretty well considered its technology and most of the problems I saw are because it is running on SFOS.
Possibly because there anyone here in this forum that shows any kind of capability for doing that. Also the most brave and productive member @piggz made a port of the kernel to PineTab which has nothing to do with the system but just the kernel.
Is it important to update the system? Without security there is no privacy. 
A new Linux security vulnerability dubbed Looney Tunables has been discovered in the GNU C library’s ld.so dynamic loader that, if successfully exploited, could lead to a local privilege escalation and allow a threat actor to gain root privileges.Oct 4, 2023 - Source
Is privacy and security important? Why the hell an user would use SFOS instead of an Android smartphone, otherwise? 
BUT is more important developing applications… right? Which are based on a broken-by-design framework and tailored for an obsolete system. How this weird behavior is named?
Streetlight effect
A policeman sees a drunk man searching for something under a streetlight and asks what the drunk has lost. He says he lost his keys and they both look under the streetlight together. After a few minutes the policeman asks if he is sure he lost them here, and the drunk replies, no, and that he lost them in the park. The policeman asks why he is searching here, and the drunk replies, “this is where the light is”.
- Source: Streetlight effect - Wikipedia
Crowd psychology
Sometimes, I wonder why is so easy to trick a group of people much more than a single one.
Crowd psychology (also mob psychology ) is a branch of social psychology that deals with the ways in which the psychology of a crowd is different from the psychology of the individual persons who are in the crowd. The field of crowd psychology enquires into the behaviors and thought processes of both the individual members of the crowd and the crowd as a collective social entity. The behavior of a crowd is much influenced by deindividuation, a person’s loss of responsibility, and the person’s impression of the universality of behavior, both of which conditions increase in magnitude with size of the crowd
- Source: Crowd psychology - Wikipedia
After all, the most famous example of the crowd psychology applied was the decision to crucifix Jesus instead of Barabba because the Jesus followers were shy and frightened while the Barabba’s thieves cried loud his name and the fool crowd align with their voices.
When someone ask you if democracy or consensus driven decision works well, reply that one or another have killed Jesus and set free Barabba.