Advice to Junior Programmers: Don't be 'that guy'. Don't be that guy that derails meeting and projects by trying to switch frameworks or languages or whatever. Writing code in your free time is different than writing code for a business on a team. Listen to your co-workers and go with the flow until you have a lot of experience under your belt.
Managers and Sr. Devs have a very keen awareness of when they run into 'that guy'. No one likes them and they are toxic to projects. Managers and Sr. Devs want to be completing projects and not defending why they are using XYZ technology.
'That guy' has a good technical ability but no business sense and usually ends up being let go. This leads to 'that guy' thinking they have been let go because no one can see their talent and adopting a victim mentality.
Be a facilitator, not an irritator.