Is the P14s Gen 7 good for CAD and engineering work?

Yes. The Core i7-12800H and up to 96 GB of DDR5 give it the CPU and memory headroom for CAD, simulation and large models. Serious 3D rendering still wants a discrete GPU, which this configuration does not list.

How does it compare with the ThinkPad T14?

The P14s uses an H-series processor and supports far more memory, so it is faster under sustained load. The T14 uses lower-power chips and typically runs cooler and longer on battery.

Can the memory be upgraded later?

Lenovo lists DDR5 memory in 32 GB and 96 GB configurations. Whether the modules are socketed or soldered varies by build, so check the specific configuration before relying on a later upgrade.

Is the 120Hz screen worth it?

The 120Hz refresh makes scrolling and cursor movement smoother than a 60Hz panel. It does not change color accuracy or brightness, so pick it for motion comfort rather than image quality.

What comes in the box?

The laptop, its power adapter and the standard documentation. A stylus, docking station and external mouse are not included.

Is it too heavy to carry daily?

Lenovo lists the unit at about 1 lb, which is light for a workstation-class laptop. The 14.5-inch footprint is larger than a 13-inch ultraportable, so bag size matters more than weight.