In an ever increasing secuity concious world, support for HTTPS is no longer a nice to have, it is a requirement.
In fact, in order to make internet searching and browsing secure and private, Google has been actively promoting HTTPS use, and starting in January of 2017 has put inplace functionality to warn users if an insecure site asks for a password or credit card number. The Chrome development team has announced that subsequent releases will culminate in non-HTTPS sites being designated as insecure and site visitors being issued with a warning in the URL bar (we anticipate Firefox and Safari implementing a similar feature).
Additionally, Google even ranks search results from HTTPS sites ahead of those from insecure HTTP sites.
While HTTP facilitates reliable connections, all communication over HTTP links can be readily intercepted and read by third parties: malicious intruders, ISPs and others. HTTPS ensures that users connect over an authenticated, encrypted link that prevents anyone examining or modifying the data being sent.
Migrating to HTTPS ensures that your website(s) will engender the appropriate level of trust in visitors.