Quick question for SaaS founders: How do you figure out why trial users don't convert?

I'm talking to founders who struggle with trial-to-paid conversion. Most of the ones I've chatted with say the same thing:

"We get signups, but users go quiet after a few days. We have no idea what went wrong until they're already gone."

Currently working on something in this space, but honestly just trying to understand the problem better first.

If this sounds familiar:

• What's your biggest frustration with trial conversions?

• How do you currently get feedback from trial users?

• Is this a problem worth solving?