We are looking to do SharePoint bug fix (CU) updates in the near future. We are currently running SP 16.0.4732.1001. What is the highest version of SP that Foundation is compatible with? I found the matrix showing SP 2016 but not any specific version.
Winshuttle supported share point versions e.g . Share point 2016 is supported by Winshuttle; However we never provide specific version ; we test only the version which latest at the time of release e.g Suppose 12.1 release was released in December 2018; then we would have used the Nov/Oct CU for our testing as the CU are released after Product release.
We recommend to first upgrade on Development Sandbox environment and test key use-cases on site. However if you face any issues we will be able to support you raise a support ticket for the same.