E-6 is niche, but not dead. Community answers point to continued interest in film overall and even the return of slide film such as Ektachrome, which suggests transparency film remained viable enough to support at least some ongoing production and processing.

For your workflow, slide film still makes sense: E-6 originals are easy to scan, and they naturally deliver the strong contrast and saturation many people want from films like Velvia. In a hybrid scan-and-print workflow, that can be an advantage over color negative film, which often takes more work to scan and balance.

That said, color negative film is generally the safer choice if you want more exposure latitude, easier lab availability, and a format with broader market support. Traditional optical printing options for slide film are also much more limited than they once were.

So the practical answer is: keep shooting E-6 if you enjoy its look, but expect it to remain a smaller, more specialized market with higher costs and potentially fewer processing options over time. If long-term convenience and flexibility matter more than the specific slide-film look, color negative film is the safer fallback.