They’re both actively researched but also both have a body of evidence supporting their effectiveness. If your only caveat is does not work for 100% of people,

They’re both actively researched but also both have a body of evidence supporting their effectiveness. If your only caveat is does not work for 100% of people, I think you’d have to exclude almost all therapies, drugs, techniques, etc. And, it’s free. To learn many great books are available for free. Or go on a retreat to practice under an instructor. If you can’t afford the retreat fee, it can likely be reduced or free. You will marvel at walking away at the end feeling no pressure to buy or do anything.