Companies still struggle with seo. I've worked at two tech companies so far, and both utilized third-party services for ssr, the reason is that bot allow a few second to render your html if it s not availbale during that time frame, you can use nextjs it s a good alternative.
In any case, it remains useful for my own projects and it s free, maybe can useful for other dev
Absolutely. We have a NextJS website and we faced some SEO problems due to Google bot not being able to get to some pages.
To be fair, we used too much sliders.