I think it's warranted if you don't look closely, unwarranted if you look deeper, and once again warranted if you look
even deeper...
Before Plaid there, the floor to require a bank account to do something in your SaaS was high to impossible.
Now the floor is low, and we got a bunch of applications that take advantage of that, so good right?
The problem is most of those applications are not in your best interests as a person.
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It mostly just enabling a bunch of junk BNPL debt and modern day payday loan schemes.
It allows offerings that are too risky to be good ideas to patch things up by just peeking into an account and making sure they'll be able to take their $X before some other rent-seeker drains the account for the month.
It also normalizes so much more access and visibility than is actually needed, so even in cases where the risk was acceptable before, now why not just peek really quickly and improve your bottom line at the expense of having yet another service with access to your financial data.
Overall Plaid probably has not been a net positive for the average person. Other countries have open banking platforms but they're also must stronger on regulation and oversight than the US, so you don't seem it become quite as much of a negative.