Stripe SaaS founders ...can I ask you 4 quick questions?

A few days ago I posted about a failed payment audit I'm building and got useful feedback about the trust problem around connecting Stripe.

Before I build anything else, I want to understand how SaaS founders actually handle failed subscription payments today.

If you use Stripe subscriptions, could you answer these 4 questions in the comments?

What happens today when one of your customers' subscription payments fails?
Do you mostly rely on Stripe's retries/emails, or do you use something else?
Do you know roughly how much revenue you lose to failed payments?
Have you ever tried a dunning/payment recovery tool? If yes, what?

Even short answers would help.

I'm not trying to sell anything here. I want to understand the problem before I build more.

If anyone wants, I'll also run a free 90-day failed payment audit afterward.