Not at Stars or 888 at least. 888 Poker have some tournaments called “triple 8”, which is 8+0,8 $ buyin, 8-handed, and 8.888 chips with 15/30 blinds, so they start almost 300BB deep. However blinds go up every 10 minutes, so after the first hour or so they are just like any other tournament. And tellingly enough most of the people, who play them, dont even show up until then.
And I think, this is the whole issue in a nut shell. Slow tournament structures have gone out of fashion, because most players simply dont have the time or patience for them. And in top of that they are also not a great money maker for poker sites. Instead we see formats like Spin n Gos and hyper turbo DONs, which cater to the fast action crowd and generate a lot of rake for poker sites.