Not sure who “us” is meant to be, but the first Internet boom (1995-2000) used a whole lot of Solaris, Windows, and Cisco. Of course there was plenty of OSS too, but Linux servers, or Intel servers, weren’t the standard.

I remember visiting early Hotmail and their sharded “capital unit” was a great big Sun storage server and a bunch of Intel desktop towers running BSD. The latter was considered rather wild at the time.

Last I checked, some eBay URLs still had “ebayISAPI.dll” in them, which is a remnant of that period.