I just removed Google's ReCaptcha for a honeypot solution with an additional name and url field. But there's also a timer which checks how long it takes you to submit the form. If you can fill out everything in <2s, you're most likely not human. I have to figure out how people with disabilities can use the page though. Good to get a reminder here. So far it performs way better than ReCaptcha, I haven't received any spam so far and plenty of ham of course. No human complaints either.

I only have anecdata of course but so far I've had a 100% success rate. I imagine this will come down eventually but for the past ~year or so it's been working fine to just hide the honeypot field with CSS