Is the Yoga Pro 7a good for gaming?

Only for light and older titles at reduced settings. It uses integrated AMD graphics, so demanding games will run at low frame rates.

Can I upgrade the RAM or storage?

The 32 GB of RAM is soldered on most Yoga Pro 7a configurations, so buy the memory you need up front. The 1 TB drive can be replaced with a larger SSD.

Does the touchscreen work with a stylus?

It supports capacitive styluses, but active pen support depends on the exact model. Check the pen compatibility for your configuration before buying.

How does it compare with the Yoga Pro 7?

The 7a uses an AMD processor instead of Intel, which usually means better battery life and stronger integrated graphics. The screen, keyboard and chassis are otherwise very similar.

Is 3.9 lb light enough to carry daily?

It is light for a 15-inch laptop with a touchscreen, but a 13- or 14-inch model will still be easier in a backpack. It works well as a desk machine you move between rooms.