Earlier quoted context omitted.
If one started at Amazon before 2016 or so, and put in a full 4 years to get 100% of their new hire stock vesting, they’d easily have more than $1 million just in stock. That plus all your other savings from the time you put in can make relaxing in a lower paid role for the next N years until you’re ready to retire an attractive proposition.
Depending on where you live (and whether you own property) that may not be a lot if you are the only breadwinner with a family to raise.
No, it's a lot for 4-5 years anywhere. This is on top of a pretty decent salary. For most working folk, putting this much aside in cash-equivalent over entire career is hard.
GP is talking about going from a high base salary to decent base salary, while using the extra comp (estimated here at approx 1mm) to smooth the impact of the drop in base. This is very manageable.