Pfft, those were pretty crap. I'd go Sun UltraSPARC if you want something somewhat useful. Back in those days of the E-series Sun servers, the Solaris operating system was actually quite useful and got a lot of work done at the high-end enterprise and government space. For a very long time, Sun's marketing slogan was "We put the dot in dot com" because almost every one of the (15 or so at the time) top-level domain controllers for the entire internet in the late 90's and early 2000's were Sun Microsystems E15000 servers.
Yeah, not anymore lol.
I was running my Intel 6c/12t 3930k (despite the name, it's Sandy Bridge architecture like the i3/i5/i7 2xxx series) until two years ago. The 32GB of quad channel ram can still compete (bandwidth, latency) with dual-channel DDR4 kits of last gen, even if the 4.5GHz clock speed on such an old arch really ends up being more equivalent to an i3-10300u or some such. Still, it had a 1080Ti and a pair of Sammy 850 SATA drives and performed admirably for the near-decade of its service. I respect your approach