Life is full of unpredictable events. One can leave this world at any point of time. This goes to show that it is prudent to make plan for FIRE. I do not see it to be bad for one to quit the full-time employment after achieving FI. This is in particularly for one to pursue the personal interest. This is taking into consideration on the possibility of the shortened lifespan due to unforeseeable circumstance.
I have noted that I have about 38 years of expenses as of now. This is equivalent to the withdrawal rate of about 2.6%. I know that this is very likely to last me for the lifetime and I might have been too conservative given that I have stayed in the full-time employment for much longer than required (25 years of expenses). Based on the calculation, I could have exited the full-time employment sometimes in April 2017. The effect of compounding has great impact and it does not harm to have more cushions and hence, I do not regret my decision to exit the full-time employment sometimes in May 2019 which is about 2 years more than the expected exit.
The practical way of approach is to focus on the present and make the necessary/appropriate decisions on how to lead a fruitful life with the abundance of happiness. This is no pressure for me to go back to full or part time employment with the knowledge of such extra income will be channelled fully to the investment portfolio which will generate more dividends. I will maintain the existing annual expense and reduce it if possible given that I prefer a minimalist lifestyle.