Essential just announced that it will cease operations starting today. The Essential PH1 will no longer receive security updates. One has to look for third-party software alternatives such as LineageOS to keep their devices up to date. The company's email app Newton Mail will cease to operate on April 30th 2020.
https://www.notebookcheck.net/Essential-ceases-operations-ends-all-software-support-for-Essential-Phone.453712.0.html