Is the OLED screen worth it over a standard LCD laptop?

Yes, if you watch video, edit photos or draw. The OLED gives deeper blacks and stronger contrast than typical IPS panels, and the touch layer makes it usable in tablet mode. The trade-off is more glare in bright rooms.

Only light ones. Radeon 840M integrated graphics handle esports titles and older games at low settings, but modern 3D games will be slow. It is not a gaming laptop.

How does it compare with the 14-inch Yoga convertibles?

It gives you a much larger screen and more room for a bigger battery and cooling, at the cost of weight and portability. The 14-inch models are easier to carry and use as tablets.

Does it come with a stylus?

The touchscreen supports active pens, but a stylus is generally sold separately. Check the box contents for your configuration before buying if pen input matters to you.

Is 24 GB of RAM enough for years of use?

Yes for office work, browsing, coding and light creative apps. It leaves headroom over the common 16 GB, though the memory is soldered and cannot be upgraded later.

Can the SSD be upgraded?

The M.2 SSD is replaceable in most Yoga 7a models, so you can move to a larger drive later. Confirm the slot type and warranty terms for your exact unit first.