The term has roots in "seven", just like Sabbath, so with 14 years in the industry, you've skipped one.
I think a solid half-year off every seven to ten years is an excellent practice for intellectually demanding labor.
What makes it a sabbatical is that it's a change of pace which furthers your career. I'd love to take a sabbatical and just work on building stuff, personally: from soldering, to designing boards, probing them, writing firmware, I'm a rank amateur, and I'd love to level up for awhile, while free of the burden of justifying my salary in the process.
It could be painting, there's a popular author who wrote a book about the connection between painting and hacking, can't remember his name but his stuff gets posted here all the time.
What it isn't, is a vacation, or a convalescence. It sounds like you haven't hit "can't work", just "sucks to work", which is a blessing.
If you can't afford it, that's understandable, there are ways to get some of the benefit from a new job, but "relieved of the burden of delivering value" is an important factor.
I've known people who pushed "sucks to work" until it became "can't work", and they don't all make it back to the profession, a bit less than half in fact. Whatever you do, I urge you to take burnout seriously, because at the limit it's a serious medical condition which can cripple or kill you.