Even if rights allow, the job of updating a script is difficult to plan or schedule. You do not know until you start whether the job is easy or tedious. A wide range of programming styles, was applied and some appear even obfuscated by design.

Then, it is not just the Python version. Also changes in OS environment and Poser organisation are to be catered for. Writing user data in the Program Files folder are a big NONO now. The capabilities of Poser have enhanced greatly over time and a lot of the hoops that had to be carefully jumped at the time are now not needed anymore, or the functions are provided natively in Poser.

No surprise there's little interest to do an update job.