I just wrapped shooting on my second film, which I shot over a period of two years. I last purchased/shot/developed Velvia in late 2006.
I began with Kodachrome until it ran out, and then switched to 64T, and then finished with Velvia. Kodachrome stands alone in terms of it's look: it has a much softer feel to it, which almost feels anachronistic now. The "nice bright colors" are fabulous, that is, until you compare them to Velvia. This stock has been described as 'cartoony", which is understandable, but it is also part of the charm!
What i adore about Velvia is that saturation which really helps the stock retain the color in telecine. Kodachrome, in my experience, sometimes ended up looking a little washed out after the switch. As for 64T? Forget about it! Perhaps it is part of my learning curve, but I never seemed able to get the look I was striving for; the temperature is so much cooler than both Kodachrome and Velvia combined, the grain is fairly noticable, and it just seemed more trouble than it was worth.
Aesthetically speaking, I prefer Velvia over all other stocks. One does have to be careful with respect to lighting, but it is very rich, creates beautiful, if not true skin tones and really tests well with viewers. I've had more than one audience member ask if it was Kodachrome, which I take as a wonderful compliment.
Obviously, I would be heartbroken if the stock were indeed discontinued. I also would prefer to retain my current and local to Portland, OR telecine transfer contact rather than go through Spectra.
I did call and speak to Spectra and they apparently are boycotting the stock to avoid a price increase. I am hopeful that the stock will re-emerge.
Good luck to all and let's focus our energies on keeping this stock available. In my view, the more diverse the stock available to super 8 filmmakers, the better for all. My favorite stock may well be another's least favorite, but that is partially why I love filmmaking; I appreciate the diversity of experience and point of view.