I’ve actually noticed more GPL-licensed projects give attribution to not only the original author but all contributors.
Whereas I can’t tell you how many times I’ve worked on proprietary software where the company didn’t give attribution for MIT-licensed code. Unlike GPL’d code, the author has no way of knowing that they weren’t attributed since the code is proprietary.
I believe GPL does have an attribution requirement btw:
Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms:
a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or
b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate Legal Notices displayed by works containing it;