I've re-printed some of the first models I ever printed & painted, gonna see how much I've improved in the last three years or so. At this point all you can really see is the super stark contrast between the original FDM prints (I think at 0.6mm layers) and the new resin prints (0.05mm layers, iirc) which I've just drybrushed.
Don't get me wrong, I'm not an amazing painter now, but even just some contrast paints and basic highlighting should be a massive improvement!