How can you laptop use it? Use the mobile as an hotspot?

yes, i did that

The purpose of open source may not making money. And maybe most of the open source developers are not good at making money. But if there is a infrastructure to help the developers to get money through their open source software, and still keep the open source free for personal learn and use, that will be fan.

Agree, they just not familiar the computer as us.

Agree, open source is rights for the users, no matter they have the ability to audit or not.

I agree with you. As the limitation of developing resources, say "no" is difficult but important.

Here's an example but in Chinese: http://www.coohua.cn/

Exactly, the cryptocurrency told us the code is law, but in the ETH, the Lord can change the law whenever he wish. It looks absurd.

I prefer to call it the "United Communities of Reddit".

Do you have the professor's homepage or name?

Not OP, but I did find from the linked paper Richard Ladner, whose bio indicates a primary focus on accessibility:

https://www.cs.washington.edu/people/faculty/ladner/

Lauren Milne and Catherine Baker are both graduate students of his, so I'm going to guess that he was the professor mentioned. He is also one of two professors at the "Taskar Center for Accessible Technology":

https://tcat.cs.washington.edu/people

Thanks

Yes, I also have the fear of losing my sight when I'm getting older. I hope I could code even I'm 70 or 80 years old. It's not just for make living, also for dignity.