On the side, this might not have to do at all with your case, but the reason I personally keep putting off sabbaticals is that I feel it can severely compound my routine wrecking habits and I don't think I'd be too strong-willed to give it meaningful purpose. Not to mention the first point, i.e. it would 100% make my industry pessimism worse. I'd like to not bounce away from tech forever. Rather, figure what scratches the same itch I've been seeking since the start.
I'm all about big road trips, big adventures but I think the couch potato risk is all too real for me.