The last time I have seen such an operation was back in 2009.

Also, even today you can buy a barebone place in the rack, with climate control and power supply. I know companies who do their disk replaces, cable management even in 2023.

I am fully aware you can have mostly managed data centre, like for example, Leaseweb, OVH, Servers.com. But if you have specialized hardware requirements, sometimes you have to wait a few days/weeks for installation.

I am old, but I don't think we are back in the 1998.