Interested in the answer too! Maybe you meant being a 'metering x billing layer' that can easily connect to any PSP, unlike 'Stripe Billing' that is only usable with 'Stripe Payments'?). In that case, we'd connect to 'Stripe Payments' (not Stripe Billing), which we already do :) Genuinely looking forward to your thoughts!

Stripe Billing is not fully internationally available so a lot of software companies are opting for Paddle. A super API would allow users to easily switch between billing platforms and avoid lock-in.

The other reason is that Stripe Billing is stupidly good. So good in fact, that they could raise they rates from 0.5% to 1-1.5% and most people would pay up since migration would cause downtime and man-hours. I use Stripe Billing now, but could integrate with Lago once and easily switch between payment processors.