By that logic, CSS is not a web technology because it can also be used in GUI toolkits like GTK[1]. HTML is used in ePUB files[2], so I guess it's not a web technology either...

Would protocols that use HTTP for transport like gRPC[3] mean that HTTP is not a web technology either? I don't know what is a web technology anymore...

[1] https://developer.gnome.org/gtk3/stable/chap-css-overview.ht...

[2] https://en.wikipedia.org/wiki/EPUB

[3] https://en.wikipedia.org/wiki/GRPC