The main question is your main motivation and the tradeoffs with respect to time, energy, and money. I think it would be helpful if you could expand on your motivations a little more.

For your personal knowledge: do you find that classes enable you you to learn better? Have you tried self-teaching things or taking MOOC classes on your own? Does the structure help? What do you want to know that you don't know now (unknown unknowns notwithstanding), and how do you think classes would help?

For making your profile more appealing to companies: what kind of work do you want to do? For example, if you want to do PhD level research work, you'll probably need a PhD. For that work you're interested in, have you found your current profile is limiting you? You mention you don't want to be a SWE, so it would be interesting to hear which work you _are_ interested in.

Source: I went through the process of doing a part-time MSCS while working full time as a SWE (details at https://alexanderell.is/posts/mscs/ if you're interested) and have way too many opinions about it.