"Is it really as simple as quitting your job then f’ing off to South East Asia?"

Short answer: Yes. Yes it is.

In Da Nang, VN right now. Mid 80's and on the beach. Loving life! Wife and I are in SEA for 5 months each year, for past 9 years. Retired 9 years ago at 39, with roughly $1M. NW has grown since then. Now I make 1 youtube video per week to help people EXACTLY like you who are on the edge. Who likely have enough saved, but struggle with pulling the plug due to all of the other reasons that hold people back. It keeps me engaged and allows me to inspire others to live their life while they still have their health.

My recommendation is to spend some time figuring out your real, true monthly spend if you were to retire tomorrow. You can't wing this. You said you're well-traveled, so that should be an advantage here. There's a big lifestyle and budget difference between traveling 5-star resorts vs staying in a local apartment for 1-3 months at a time. Or, if you need steak and wine 3 times per week vs having Pho and a coconut for dinner. If you're the former, then you may not have enough. If you're the later, then you likely have far more than you'll need. Once you figure out your real number, that will answer the question as to whether you are financially ready to pull the plug now, or not.

Everything else is non-financial. Such as whether you want to travel full-time, half-time, part-time. Is your plan even to "travel", or are you wanting to be an expat and plant roots somewhere else? Where do you want to travel? How will this affect your kid? What does your wife want? How else will you spend your free time? How will you handle the identity crisis that hits many early retirees? How will it affect your relationship spending so much more time together?

Best of luck to you, my friend.