1. PTA in itself does not provide you all the tools to validate these, but it's low-level enough that you can implement any validation you want on top easily, if you're proficient with CLI tools. I don't think I would use it at the enterprise level simply because they're less commonly used, but for personal finances I find it sensible enough.

Which mistake do you think is more common with PTA than with other programs?

2. What exactly would not be sustainable with PTA which would be with other programs?