NO! Two big reasons, among many others: 1) These are unnecessary third-party entanglements, allowing anyone to be slienced within a year simply by refusing to renew their certificates. 2) It's the 21st century, very soon, most servers will not have administrators - smart IoT devices, if we want them to use SSL/TLS, need certificates. If you think updating these certs on regular servers is a PITA, try it on a an embedded device that has very limited or intermittent Internet access, if it's even connected to the public internet at all!