Having had this discussion on here for about the last 16 years, here's where I am now: Gentle Parenting has no central "text" or origin, (No, Sarah Ockwell Smith didn't invent it) so it's not a defined method or approach, which means these conversations will always go around in circles because everybody has a different idea of what it means and nobody can prove their point so there will never be consensus.
I used to identify with it as a label but don't any more. I've no idea when I dropped it - probably some time between 2016 and 2020. I haven't really changed what parenting approaches I use. I just don't insist that they are "gentle" and I no longer have a very strong idea of what I would say that means. I actually think what we used to call gentle parenting ~10 years ago is totally mainstream normal modern parenting advice. There is really nothing in up to date, modern parenting advice which goes against the GP principles I originally felt represented the idea. There used to be - but not so much now. Parenting advice has changed a lot.
I have also learnt a LOT more about behaviourism and have gone full circle and don't think it's totally evil any more
though I do think that behaviourism as it is popularly interpreted is often overly simplistic and doesn't tell you the whole story (and sometimes that's OK - you don't always need to sit and interpret every single behaviour).
Some of the GP stuff on social media has gone the same way as everything on social media in terms of polarisation, which has strengthened the idea of it as a "brand" (identity). I don't think the identity part is helpful. I think this actually kept me away from useful advice when my eldest was younger because I was afraid that it wouldn't "fit with my parenting style". I think this is worse now because of the way SM algorithms and groupthink work, and it is causing some pockets of extreme thinking. I see a lot of parents today online worried about disordered attachment and trauma, which I never used to see. It's extremely unlikely that normal, non-abusive, non-neglectful parenting would cause these things. Even if you are addicted to a screen and struggle with anxiety. I think social media makes this worse (I like this article, even just the free part of it: Does Everyone on Reddit have OCD?)
There is a current moral panic about parenting/standards but I honestly don't think this is down to anything at all other than the fact cultural norms change, and every generation thinks children are uniquely badly behaved in the generation below (plus a crisis in schools because of many complicated reasons but probably not hugely parenting. Parents and children have not fundamentally changed.) I think there have always been crap parents, there have always been anxious parents, there have always been overprotective parents. Probably some of them are more drawn to online content which calls itself gentle parenting and some of that leads to more extreme or more public manifestations of what would happen anyway. In general I think if you took all parenting everyone is doing as a whole now compared with any point in the past it is a net gain. Collectively, I think we parent better than we used to in the past and I think it is likely to continue to improve in the future, whatever trends come and go.