Free HTTPS certificates via Let’s encrypt are a great step forward. Specifically for non commercial organisations as these organisations often don’t have the money for expensive commercial certificates.
In three years they issued over 380 million HTTPS certificates.
As google is now ranking down websites without HTTPS this is also an important issue for the SEO ranking.
And if you have access to the comand line of your server you can setup a cron job to automatically renew your certificates.