announced that support for the classic version of Google Sites will continue until the end of 2021!
In the same announcement about support for classic Google Sites there was information about new features being added to the new (current) version of Google Sites. Those new features include tables, image carousels, and greater control over font styling.
If you're wondering about the key differences between the classic version of Google Sites and the new version of Google Sites, I wrote an overview of them here.
And for those who want to convert their old Google Sites to the new version, I created this video tutorial for you.