The Radivan universe is a GURPS TL10 universe, with some areas advancing into TL11. It's a hard TL10; the only superscience that exists is the Choi drive. The tech is somewhat more conservative than what GURPS thinks TL10 should be. In particular, there are almost no personal beam weapons in use. They exist, and are used for some sporting purposes. They suffer from a trio of problems that make them unsuitable for most military uses: power density of power cells doesn't allow particularly high shot counts, they overheat in vacuum, and have to be tuned for what material they're being used against. As a result, the personal weapon of choice is some sort of slug thrower. Militaries tend towards magnetically propelled projectiles; civilians towards caseless chemically propelled ones. There are exceptions and variations, of course.

There are other areas where I'm also much less optimistic than GURPS Ultra-Tech is. Dry nano-tech is one; I'm not convinced it's possible within the constraints of physics. I'm also sceptical about the ability to record the state of a brain, particularly without destroying it. So brain-taping, brain downloading, and related technologies don't exist. It is possible to destructively upload the mind of someone who is about to die (it's possible to do it to someone who isn't about to die, but that's murder most places), and run the result on a powerful computer. They suffer the same travel restrictions as SAIs (see below).

On the other hand, I am more optimistic about some technologies than Ultra-Tech is. One of these is communication and information sharing.

In addition, there are some restricitions on LAIs and SAIs. They exist, and are widely used in many places. However, they're not transportable through wormholes -- even just on disk. Transport through a wormhole results in the AI being erased. NAIs aren't harmed by the process. This is one piece of evidence that the "Aliens created the wormholes" supporters point to.