Are you familiar with the process of extracting the caffeine in decaf?
Unfortunately it isn't without potential downsides.
Supercritical CO2 extraction is pretty innocuous. Just buy good decaf from a place that doesn’t bathe their beans in toxic waste.
There are multiple methods that James hoffman breaks down in this video iirc, if anyone is curious.
Yes, I know the four main methods of decaffeination. The haters have gone down this road with me many times. Why can't people just let me drink my decaf? It's like they can't enjoy their caffeine unless everybody does. It's weirdly pushy.