When is it worth doing multiple sitemaps?

Question

Google

1. In what cases is it necessary to make more than one sitemap, but several?
2. What are the benefits of multiple sitemaps?
3. What is the principle of splitting the sitemap (by type of content, by sections, stupidly in order)? Why exactly?
4. What is the limit in Google on the number of pages in 1 sitemap (it seems 50000)?
5. Does it make a difference to make a sitemap for 10,000 pages, or 10 sitemaps of 1000?

Answer 1

only if it is large and does not fit into the limits, hit by size or number of records