As a previous occasional user of Calendly I couldn't justify the cost of the ongoing monthly subscription for a simpler version of it which is set up and forget

As a previous occasional user of Calendly I couldn't justify the cost of the ongoing monthly subscription for a simpler version of it which is set up and forget. Cal.com seems built with a better plug-in foundations and it's free for individuals with open-source code and open development process. What's not to like?