> An approximate 20% reduction in bandwidth looks significant to me.

To me it doesn't. There's compression for much bigger gains. Or just, you know, just send less data?

I've worked at a place where our backend regularly sent humongous jsons to all the connected clients. We were all pretty sure this could be reduced by 95%. But, who would try to do that? There wasn't a business case. If someone tried succeeded, no one would notice. If someone tried and broke something, it'd look bad. So, status quo...