I'm not in a position to judge the actual security of PaleMoon and for what I know it might be more secure for the reasons you point out.
As for why I won't use it without precautions I really do not want anyone to be able to use "this happened because skinkestek used an old browser, maintained by two persons in their spare time" if something goes south at some point.
That said, I have tested it and for me it wasn't just rose tinted memories, I prefer the UX of PaleMoon far to modern Firefox which I still prefer to Chrome (for both UX and personal reasons.)
I'm not in a position to judge the actual security of PaleMoon and for what I know it might be more secure for the reasons you point out.
As for why I won't use it without precautions I really do not want anyone to be able to use "this happened because skinkestek used an old browser, maintained by two persons in their spare time" if something goes south at some point.
That said, I have tested it and for me it wasn't just rose tinted memories, I prefer the UX of PaleMoon far to modern Firefox which I still prefer to Chrome (for both UX and personal reasons.)