Ran IRIX back in the day and the thing I most remember is display postscript with zoomable everything. Today a resto-modded [1] ThinkPad is probably a better choice, featuring repairability, 64GB max RAM, three storage drives, docks, usb-C, a choice of modern hi-res display screens, openboot etc.
(1) https://www.xyte.ch/shop/x2100-pricing/