Some types of papers can be generated very quickly with AI tools. Data analyses (PCA, MDS, FA, and calculation of various indices and metrics for example) and simple modelling exercises (GLM, GAM, RF, XGB, ridge regression, Bayesian hierarchical modelling, basic DL and NNs, etc.) that used to take weeks can be done and written up in a day, with reproducible figures and code repositories to back them up. AI tools can also greatly speed up literature reviews that used to take months. And they can speed up structuring of manuscripts and discussions, even if they aren't abused to actually write the papers.
This has been developing rapidly over the past few years -- the methods have been accessible to expert users for a few years now, but even in just the last month, new tools have been released that make them accessible to everyone able to pay a small subscription fee.
Personally, I usually only write one first-authored paper a year, but honestly if I were targeting the low-hanging data analysis and modelling fruit with the tools available now, and working hard at it, I'd be able to pump out one mid-tier journal paper a week now, too.
If it's not this type of paper, some other fields have always had ways for those with resources to pump out low impact, quick win papers: a paper each for running the same test on several different substances in materials science, a paper each for running the same quick lab study on several low-cost species in biology, a quick paper for each small n social psychology experiment.