In fact skimping on VRAM is excellent as it forces you to upgrade quicker,which works well for margins.
No doubt this is something they've done on purpose. Can see myself being time limited in the use of one of these in precisely 5 months time. I was hoping to grab a 3080 to last me years at ultra wide res (and potentially whatever res a future hdr1000 120fps ultra wide monitor under £1000 takes). Low vram has me worried it won't and has me considering the 3090... Specs wise and price wise, the 3080 with more vram would've been the most ideal for me. 3090 value proposition doesn't look great looking at the specs.