[ZephyrBlu]

1) I think 10yrs is too short of a timeframe if you want to maximize your income

On a 10yr timeframe the decisions you make will be very different than 20yrs. For 10yrs, your best bet is probably finding the highest paying Senior/Staff role you can then staying there. For 20yrs, even if it takes you 15yrs to become a Director you will probably earn more than your high paying IC role.

20yrs gives you time for things to compound (Skills, network, etc). 10yrs does not really afford you the same time. You'll probably be jumping around jobs to maximize short-term TC instead of building and compounding on long term things.

2) Considering you are talking about tech stacks, I don't think you have a good framework for thinking about this question

What dictates compensation? Generally the scope and responsibility of your role. Nothing to do with tech stacks unless you have an incredibly niche skillset.

I don't think this question is that interesting. Play long term games and build long term skills. On a long enough timescale things like tech stacks are effectively fads. Relationships with other people and skills like being able to lead people are always going to be valuable.