Great, +1 for this long awaited migration :)) here the maintainer of lmfit-py, sardana ans spyder
I will take care of lmfit-py. but I think that the notebook is not a strong constrain for lmfit-py I did the work for sardana., so it is ok in experimental I did the work with others for spyder and it is sitting into experimental. nevertheless this would be antangle with the spyderlib -> spyder migration which need to be done guidata, guiqwt and spykeviewer in a few days (this week, I will upgrade guidata and guiqwt (job already done and release by the upstream) for spykeviewer. (I do not have yet filled a bug report). Cheers Frederic