Is it worth using Next.js in Runet?

Question

React

I have doubts about this framework from the point of view of SSR, will the site be well indexed, for example, in yandex, if it is developed on Next.js?
I decided to do a little research and check through the site The site through the eyes of a robot , how such sites developed on next.js are indexed.
The following sites were included in the study:

• Syntaxt.fm
  
• npmjs
  
• material-ui.io
  
• expo.io
  
• codemenitor.io
  

Result: in most cases I get a response that the robot does not see the page or no other pages were found on the site.

Answer 1

Yes, it's worth it. Because otherwise Yandex, Mailru, etc. Search engines will not see the content of your site. Google will see, but it ranks SPA sites worse. I use SSR on my site with NextJS - everything is fine (I have a blog).
Ps regarding the sites that participated in the study: it is possible that SSR is configured only for certain pages there.

Answer 2

Well, just the same, SSR allows you to solve the issue of site indexing that arises when using spa.
https://habr.com/ru/post/418619/ - not really about next.js, but about react.

Answer 3

I decided to do a little research and check through the site The site through the eyes of a robot, how the sites developed on next.js are indexed.

In order to see sites through the eyes of search robots, you used a third-party solution. Where is the logic? Go to the search engine you are interested in and see what is indexed there.
The same one you mentioned, material-ui.com is perfectly indexed.
SSR is used for indexing in search engines and sharing in social networks. The robot does not see the difference with a static page.