Hi we already bought our new SharePoint online E3 license and we are now task to create our Company Portal landing page that needs to be responsive for mobile device.
We are now doing some R&D and we still not decided if which between Classic or Modern experience should we use to create the portal.
I saw some post that it is not advisable to change the sharepoint online master page like what we are doing in On-Prem. If in classic, where we will put on the scripts and library to make the site responsive without touching the master page.
Need your thoughts and suggestions.