This is pretty much exactly what we do to serve aerial/satellite imagery maps. We convert the imagery into Cloud optimised geo tiffs and store them in S3 https

This is pretty much exactly what we do to serve aerial/satellite imagery maps. We convert the imagery into Cloud optimised geo tiffs and store them in S3 https://www.cogeo.org/ https://www.cogeo.org/ then the browser can request the tiles directly from S3. Even the big imagery providers are now storing their imagery as COGs, eg https://registry.opendata.aws/sentinel-2-l2a-cogs/ https://registry.opendata.aws/sentinel-2-l2a-cogs/