If someone was looking to change stacks how does one go about it? Say I know someone who has been going through tutorieals, reviewing the docs, creating a personal project. Technically they feel like a solid intermediate at times but still beginners with the ecosystem. They are at a senior level in another stack.

What's the next step? Apply for new stack with existing resume? Do you try to work in new stack at current role?

How does one acual transition?

For some details this friend has 20 years with php/jquery experience.. a year as an angularjs developer along the way and wants to be part of a react / vue ecosystem but has a hard time of letting go of php.