To me personally PHP is the cheapest way of building a dynamic website. Just a few euros/dollars a month will get you a shared web hosting plan with full support for the LAMP stack & free email.
That was true in 2004. Today you get a virtual server for five bucks a month. Feel free to run ANY stack you prefer.
Virtual server is great except now you are reponsible for server management, SSL certificates, backups, DB, firewall configuration, mail server, etc. I don't want any of that which brings me to PaaS providers like Heroku and Vercel where the cost is many times higher.