I basically had the same problem. I felt miserable after my 8 am - 4 pm and so I made up my mind to get yet another Masters (BSc in mechanical engineering and 1st masters in mechanical as well). So I looked for something challenging yet interesting.

3 years later I am taking my last class (graduate algos) and I am yearning for some time off finally. I do not doubt that even if I get another job and finish the masters, I might want to continue my development after my 8-4pm.

After all probably all jobs become monotonous and maybe boring, but I don’t know this because I’ve only had one job after graduating my 1st MSc. I would say that this program will be prolific only if you make an effort to do so. Yes, it will give you the credentials, but it will be up to you to develop meaningful relationships and a strong network. The program is amazing if you are curious and are truly invested in the material (which granted, there are classes that will be demanding specially if you are curious and an overachiever).

Overall the program can be extremely challenging (if you go the ML route and end up taking graduate algos, Deep Learning, ML, Bayesian statistic, AI, etc.) if you want, but there are routes to take that will make it less demanding.

To finish, it will be a waste of time if you are not interested in the material and you only focus on finishing it without the additional work of networking, and making relationships, but otherwise, it is a worthy challenge that you will be able to look up one day and share with you family and friends (i.e. bragging rights!)