I tend to agree. I'm one of those developers maintaining a few open source projects on the side and sometimes struggle to keep up with updates to the tooling and best practices.
For me, it has caused more confusion than help that the old way of using go get still works, even without any warnings to tell me I should start using the new way. I wanted to upgrade myself to using the latest best practices ASAP, but struggled to learn the proper new way, because all the old ways I do almost automatically still work.
As long as the messages about how to do instead are really clear and helpful, I find it should be better to help people move in the right direction as soon as possible.
For me, it has caused more confusion than help that the old way of using go get still works, even without any warnings to tell me I should start using the new way. I wanted to upgrade myself to using the latest best practices ASAP, but struggled to learn the proper new way, because all the old ways I do almost automatically still work.
As long as the messages about how to do instead are really clear and helpful, I find it should be better to help people move in the right direction as soon as possible.