Nah, you don't need that.
Here's a (currently GPU and CPU-less while waiting for Ampere and Ryzen 5000) S4 Mini (5.0L, though slightly more with the custom front bezel heatsink) with an RTX 2080 Ti and a 3950X. Brickless, using a modified 800W server PSU. Though that's for the ... shall we say certifiably insane? It definitely takes a willingness to sacrifice a lot of expensive hardware to make it work. I don't think most people are willing to
CNC mill down their fans to save space
That wasn't what I meant though, I was thinking more along the lines of the "relatively easy" <5l builds with some TaoBao sandwich-style FlexATX case and an ITX-sized GPU, which, all things considered, can at least be done with off-the-shelf parts and to me qualifies as an absolutely epic <5l PC (especially with upcoming ITX 3060s). My entire point was that the Meshlicious targets no-compromise performance, which you don't get in that kind of volume unless you're some kind of wizard.