How was NeXT able to make super-duper-black metal computers over 30 years ago? The answer may well have been "they weren't laptops" - either because the finish would never have survived going into and out of cases all day long, or because we don't want to THINK about how many fingerprints they would have attracted if touched on a regular basis. Was it that they weren't laptops, or was NeXT doing things that Apple won't (for cost or environmental reasons).
I loved the look of the NeXT machines, and will be ordering my MBP is Space Black to get as close as I've seen since, and because of the anti-glare factor.
I also loved the suggestion of a titanium machine in natural color (Apple's Rose Gold is close, but not right there and not as attractive). I've never seen a computer in natural titanium (I think the TiBooks were treated, or else they were an alloy that didn't have the color) - but cameras have shown up that way over the years, and many of them are gorgeous - and very, very durable.
The problem is that cutting unibodies for a high production laptop out of titanium would be a wonderful way to exhaust the world supply of milling machine bits.😂 Aluminum is relatively soft and mills nicely. Pure titanium is not, and doesn't. It can be milled, if you're building stealth aircraft and have that kind of budget. The Russians used to build submarines out of the stuff, and it both made wonderful submarines and bankrupted the Soviet Union (not on its own, but it WAS a factor). While the boss wasn't looking, the Russian titanium workers used to make camping gear out of scrap titanium. They traded it to Western mountaineers who loved it, and a lot of ultralight gear is now made out of titanium, but it's stamped, not milled.