Multiple domains don`t help rankings

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Mueller went on to explain that most sites don’t need to split their content load, and doing so won’t help rankings anyway:

“For most sites, this isn’t needed. (It won’t push Google to crawl more, and more crawling doesn’t mean better ranking.)”
Begging the question. If reducing your site’s content load by splitting it across multiple domains doesn’t assist Googlebot’s crawl capacity or your site’s ranking, why split your images/content at all?

Google’s Search Central documentation (large site owner’s guide to managing your crawl budget) covers that question:

What Google says about crawling capacity limit and demand:

“Googlebot wants to crawl your site without overwhelming your servers. To prevent this, Googlebot calculates a crawl capacity limit, which is the maximum number of simultaneous parallel connections hong kong mobile numbers list that Googlebot can use to crawl a site, as well as the time delay between fetches. This is calculated to provide coverage of all your important content without overloading your servers.”
“Google typically spends as much time as necessary crawling a site, given its size, update frequency, page quality, and relevance, compared to other sites.”

No ranking benefit from using other domains
Mueller answered a similar question about the advantage of hosting images on your domain in March 2019, saying there’s no SEO benefit where you host them and using your domain or another domain won’t affect how well they rank:

Muller’s post on X:

It doesn’t matter how you host the images; there’s no SEO bonus for having them on the same host/domain. However, since changing image URLs is hard, I’d use your own hostname for the CDN.”
The SEO professional finished by asking Mueller to confirm if “using a subdomain doesn’t create a separate prioritization queue for each subdomain from Googlebot’s perspective.”