> and don't really have a product that is released to customers who pay to support old versions for years My main product is 12 years old, with paying support

> and don't really have a product that is released to customers who pay to support old versions for years My main product is 12 years old, with paying support customers, and with bugfix branches for older releases. > just to re-run black and isort to backport a fix to a release branch Great! That's an excellent reason. But it has nothing to with bisection.