People want to list everything on there resume, and that is the main problem. Most of the startup mvps and SMB softwares can easily be developed without any fancy tech, but developers will do it any way.

I remember a mid sized saas app of one client, built completely on plain vanilla php,css, javascript(jquery was used) and mysql database.

It was handling millions of request from thousands of paying clients without a hitch. Only fancy thing he did was an automatic backup system using custom script using replicated database. It just works.