That's what I figured too, but even though it was 20 years back, Dreamcast's failure is legendary as a tragic chapter in gaming history. I guess people forgot just how poorly it sold.

Wii U and a Vita, I still own both of them.

Wii U. Still hooked up to my TV. No regrets.

After the Neo Geo, next lowest I have is the Turbografx-16, (well, it's my brother's technically, but we share a flat and all our consoles) then Dreamcast.

We're collectors. 

Well it was a dedicated handheld device, with different games cartridges just like the game boy, problem was seriously limited game catalog. I still remember entering the Electronic Boutique store and buying Duke Nukem and Jurassic Park for it.

The intriguing part is that it supported a dial up modem, a browser and email features. For a device from 1999, it was something.

.First owned Game Gear(1992) then later Original Game Boy(1996)
.First owned GameCube(2002) then later PS2(2003)
.First owned Wii U(2012) then later PS4 pro/Xbox One X(2017)

Yes, i sometime buy lowest selling console first then highest selling console.

That's understandable.  I don't mind it myself but I can see why others would just prefer home consoles.  

Well, for me it is that I hadn't entered console gaming back then (still played on PC). But with the Dreamcast it was close. A friend had a Dreamcast and it was the first console I experienced. I certainly considered getting one myself - but then Sega discontinued it, so I decided not to. I kinda regret it these days. Dreamcast had cool games and enough of them to justify owning the console. But for me it was the additional hurdle to jump into console gaming in the first place. Years later the Wii got me finally into it.

Oops, just realized that the Turbo Express portable sold less than Lynx (1.5m), so that's the lowest for me.

Mostly due to very poor marketing,most did not even know it existed.