Genuine question for textile and fashion brands: what's actually stopping you from switching to sustainable fiber?

We've been having this conversation with textile brands for three years now. Some switch immediately after seeing samples. Some are genuinely interested but never follow through.
We want to understand why not to pitch anyone, genuinely to understand the barrier. If you work in textile sourcing, fashion manufacturing, or product development:

What's the real reason sustainable fiber hasn't made it into your supply chain yet?

A) Cost doesn't work at our current margins
B) Not convinced the quality is consistent enough
C) Can't find a supplier I actually trust to deliver
D) Haven't prioritized it yet but it's on the list

No wrong answers. No sales follow up from me. We make banana fiber yarn from agro-waste in Tamil Nadu and we're trying to build solutions around these exact barriers. Your honest answer helps us figure out what to focus on. Happy to share more about what we do if anyone's curious just ask.

Just Comment your options A,B,C or D