The "Caution: Long term reliability cannot be assured [...]" message is also present in the 4th (https://www-ssl.intel.com/content/www/us/en/processors/core/4th-gen-core-family-mobile-u-y-processor-lines-vol-1-datasheet.html) and 5th (https://www-ssl.intel.com/content/www/us/en/processors/core/5th-gen-core-family-datasheet-vol-1.html) generation mobile (Haswell and Broadwell) datasheets.