My group recently migrated from classic to New Google Sites. There were many things I was doing with classic sites and/or apps script's Sites Service I can't do
hashchange
dash.js
tsung
autoedit
dataimporthandler
google-api-nodejs-client
litespeed
packets
dynamic-feature-module
karel
here-api
cart
c-str
git-secret
static-site
open-uri
eris-blockchain
mongodb-cloud
osgi-fragment
get-winevent
memento
react-native-fcm
actionlistener
sarama
gong-wpf-draganddrop
agda-stdlib
qjson
resemblejs
qtserialport
autodesk-bim360