Googlebot has been put on a diet of URLs by the Scheduler in the web crawling system. If your URL’s are not on the list, Googlebot is not coming in. The increasing influx of content flooding the internet means that there is a need for prioritisation on web pages and files visited. Are you telling Googlebot and the URL Scheduler that your content is less important than it is via technical SEO and architectural blunders? There’s a real need to understand Googlebot’s persona and that of the Scheduler, along with the jobs they do, in order to ‘talk to the spider’ and gain more from your time with it.