I only went 12s on the MTBs because 11s wasn't really a thing for them at the time. I've stuck with Ultegra and GRX 11s for the gravel and road bikes and will do until the usual thing happens when the parts become less available and more expensive and then it just makes sense to move to the newer stuff. Given there's no 12s GRX though I reckon we've a couple of years of 11s still and that's about how long it takes me to destroy a bike/groupset so I should be golden :)
I only went 12s on the MTBs because 11s wasn't really a thing for them at the time. I've stuck with Ultegra and GRX 11s for the gravel and road bikes and will do until the usual thing happens when the parts become less available and more expensive and then it just makes sense to move to the newer stuff. Given there's no 12s GRX though I reckon we've a couple of years of 11s still and that's about how long it takes me to destroy a bike/groupset so I should be golden :)