Just for reference, Peer 1 has a data centre in downtown Vancouver which, fifteen or so years ago, was able to accept my then-employer as a client and offer us a quarter, half, or full rack, but could only offer us enough actual power to run about two servers.

The reason being that they had a huge number of old, grandfathered-in clients with old systems from ten or fifteen years ago which were using massive amounts of power for the work they were doing; newer systems could do the same work for a tenth the power or less, but the customers have no reason to upgrade so they don't.

Getting any more power into the building, I was told, would require having BC Hydro replace the transmission lines coming into the building, which would expand out to a modernization of a lot of the transmission lines in the neighbourhood. For obvious reasons it was cheaper for them to just build a new data centre somewhere else, though they wouldn't say where at the time.

When it comes to the hyperscale data centres that are all the rage these days, it's very likely that downtown Seattle doesn't have the power infrastructure to support very many, if any; couple that with the claim from this random website I've never heard of that hyperscale data centres could be up to 10 million square feet and you'd probably have to bulldoze half of downtown Seattle to build the infrastructure required.

https://programs.com/resources/data-center-statistics/

at face it seems like it would be "retooling" rather than ground up construction, with foundations for connection infra, it should go up fast, and easy if AMZ already owns it.