I think the biggest change in public sentiment in datacenters is a reaction to the extreme scale they're being deployed at these days. They're really vastly unlike datacenters of the past. The power densities are so much higher, they're so much larger, and they're getting vastly more environmental waivers and tax subsidies than ever before.

A quiet, average-sized warehouse-like building in an industrial area with a big power substation next to it often didn't bother a lot of people. A giant monster of a building being built in what was previously people's backyards with howling on-site power generation that got installed without any kind of air quality reviews because they're allegedly "temporary" and starts sucking the groudwater dry is a whole different story.

This is a datacenter: https://maps.app.goo.gl/pzSsUHXPaUuLGaDa9 I doubt many people even know its a datacenter. Its pretty much any other office building.

This is also a datacenter. I imagine just about everyone living nearby knows its a datacenter. https://maps.app.goo.gl/wR4NgcWQVhJAy5Gy6