For a long time I’ve been meaning to sort out SSL certificates for my domains & secure traffic to them. Last year HTTPS became a google ranking factor & since then site wide HTTPS adoption has been on the increase. The problem with HTTPS is that up until recently it required buying an SSL certificate from a vendor & installing it on your hosting.
SSL certificates are not cheap & need renewing on a regular basis. It isn’t just a one-off cost. Furthermore, if you have multiple websites hosted on shared hosting, you need to sort out & purchase a separate certificate for each domain, or buy a wildcard certificate to cover your domains. Not cool.