P3Dv5’s claim to fame is "study-level" aircraft. These are simulators within the simulator.
To bring P3Dv5 up to modern standards, the community generally considers a few specific utilities and expansions as "essential": Weather & Atmosphere Active Sky P3D is the industry standard for realistic weather injection. For those wanting to push visuals further, the P3Dv5 Enhancement Pack p3dv5 addons
The answer depends on what you value in simulation. P3Dv5’s claim to fame is "study-level" aircraft