I actually prefer the design of the 808 over the 510. One is able to stand cartos, etc. up on a desktop. RBAs too, if there were such a thing. Alas, I have joined the 510 crowd, though I've yet to convert my home-brewed mod to that. ...may soon.
What he said, except I don't have the time to do more than rebuild Nova heads, all my home-brewed-mod stuff is in a drawer, along with my knitting needles, lace bobbins, flintknapping kit, half-made gourd drum, etc.
One thing not always mentioned is that the non-vv 808's are typically voltage-regulated so that the vape stays the same throughout most of each charge cycle, so it's a more-predictable vape than 510s on BEGINNER stuff.
However, now that Smokeless Image has 808 Spinners, I suspect I might have stayed with 808's for a LOT longer, just using 808-510 adaptors for the ViVi Nova.
But long term, almost all of the advanced stuff is 510, often also with eGo threading, often not. Just 510 on a lot of the replaceable-battery mods. So I cannot see switching back, but I might get an 808 spinner for my nephew since the rest of his family has my old 808 stuff as hand-me-downs.