Be nice. Or else.
Yes, I think tables are semantically correct (menus are just fancy pricing tables).
I preferred Myriad as a marketing typeface precisely because it wasn’t like a system typeface. It’s certainly a more elegant typeface at display sizes. That being said, I’m pleased they’re now treating the whole website consistently instead of mixing Myriad and SF.
I use a Humanscale Liberty at work, and an Aeron (first generation) at home. The Aeron is far more comfortable for long-term use.
That wasn’t my point. I’m not making a trade-off by designing our web apps for desktop. That’s the only hardware that runs the software. I’m targeting 100% of our users, and satisfying their requirements.
I’m an in-house designer building web-based software for a manufacturing company. Most of our internal software is used on desktop or EPOS screens, so making the (usually information dense) interfaces work in tiny screens would be a waste of time.
Best advice: don’t blindly follow conventions. Mobile-first design may be appropriate for some things, but pointless for others. Assess each project and choose the most appropriate techniques.
It is, yes. Be aware, though, that alt text should describe the content of an image to users that are unable to see it. There’s no such implicit role for figure captions.
Also, from WebAIM:
Alternative text should not be redundant (be the same as adjacent or body text).