Is the ZBook Ultra G1a good for CAD and 3D work?

Yes. It is a mobile workstation line aimed at professional CAD, 3D and data applications, with ISV certification and business support behind it. Check the exact GPU and memory configuration, since those decide performance more than the chassis.

Does it have a touchscreen?

Yes, this version has a 14-inch touchscreen. That helps with sketching, annotation and tablet-style input in the field.

Can I connect older USB-A devices?

Yes. It has both USB-A and USB-C ports, so legacy peripherals and modern docks work without an adapter.

Does it support mobile broadband?

No. There is no SIM slot and no mobile network support, so you tether to a phone or use Wi-Fi.

Is there an optical drive?

No. It has no built-in optical drive, so disc-based software or media needs an external USB drive.

How does it compare with a ThinkPad P14s or Dell Precision 5490?

All three are 14-inch professional workstations. The ZBook competes on HP's security and manageability stack and touchscreen option; the ThinkPad is known for its keyboard, and the Precision for Dell's support network. Compare the GPU, memory ceiling and warranty terms for your workload.