FWIW, at $DAYJOB we've been actively getting rid of our Comodo certs and replacing them with Let's Encrypt certs, because the Comodo certs don't work with certa

FWIW, at $DAYJOB we've been actively getting rid of our Comodo certs and replacing them with Let's Encrypt certs, because the Comodo certs don't work with certain older Android versions that we have to support - but Let's Encrypt's all just work. If others are doing the same, this would be motivation for Comodo.